Remove Nuke; switch CI and release to direct dotnet calls

[glen-84]

Summary

• Remove Nuke from the repository. CI's matrix generation moves to a small composite action that reads src/All.slnx; release-time pack/publish/publishaot move to direct dotnet pack / dotnet nuget push / dotnet publish invocations.
• Add a committed src/Build.Pack.slnx scoped to exactly the projects that emit nupkgs today (152 of them). It also picks up HotChocolate.Text.Json, which was missing from Nuke's hardcoded .build/Helpers.cs directory list and so was never packed despite living in src/. Generation criteria mirror Nuke's Helpers.cs + PackLocal filter (area-directory list, exclude benchmark/demo/sample/example paths, exclude filenames ending in tests) and additionally exclude any csproj with <IsPackable>false</IsPackable>. Replaces Nuke's auto-generated Build.Pack.sln.
• Rewrite init.sh / accept.sh as bash; add init.ps1 / accept.ps1 as PowerShell counterparts (Windows PowerShell 5.1 compatible, no pwsh install required). Drop init.cmd / accept.cmd — modern Windows runs local .ps1 files directly under the default RemoteSigned execution policy.
• Delete .build/, .nuke/, .config/, build.sh, build.ps1, build.cmd. Update .gitignore (drop Nuke-generated .sln entries) and CONTRIBUTING.md (remove Nuke mention).
• This is PR 3 of the planned Nuke removal series (PR 1 = Remove HotChocolate.Types.Shared and unused build tooling #9764, PR 2 = Convert HotChocolate.Templates to csproj-based template package #9769).

Notable behavior changes

• Test matrix gains HotChocolate.Text.Json.Tests — the HotChocolate/Json area was missing from Nuke's hardcoded .build/Helpers.cs directory list, so these tests never ran in CI. The new slnx-driven matrix picks them up, closing a long-standing gap.
• Test matrix gains Demo.Catalog.Tests — Nuke's filename filter dropped anything containing demo. The project lives under src/Mocha/test/ and looks like a real test project. If it shouldn't run in CI, options are to rename it or add an explicit exclude in .github/actions/generate-test-matrix/action.yml.
• Release packs gain HotChocolate.Text.Json — same Json-area gap, on the pack side. Net change: +1 published nupkg per release. No projects removed from the pack set.

Test plan

• dotnet sln src/Build.Pack.slnx list — returns the expected 152 projects.
• dotnet restore src/Build.Pack.slnx — restores cleanly (the Marten NU1904 warning is pre-existing).
• Matrix-gen jq pipeline ran locally against src/All.slnx — produces 126 entries including the two newly-added test projects above.
• accept.ps1 tested on Linux via pwsh against a synthetic __mismatch__/ layout (overwrites existing snapshots, deletes nested mismatches, removes the directory).
• init.ps1 parse-checked under pwsh.
• Templates package conversion was validated end-to-end in PR 2 (Convert HotChocolate.Templates to csproj-based template package #9769); that path is unchanged here.
• All dotnet pack / dotnet publish invocations use -p: instead of /p: to dodge MSYS path-conversion on the Windows runners in the build-nitro-cli matrix.
• No release-side verification was run — no tag pushes, no publishes, no workflow re-runs. The next real tag push exercises pack / publish / publishaot end-to-end.

[Copilot]

Pull request overview

This PR removes Nuke-based build automation and replaces it with direct dotnet-driven CI/release steps plus lightweight helper scripts/actions. It shifts test-matrix generation to a composite action that reads src/All.slnx, and introduces a committed src/Build.Pack.slnx to drive release packing without Nuke.

Changes:

• Remove Nuke tooling/config (.build/, .nuke/, dotnet-tools manifest) and legacy build.* entrypoints.
• Update CI/coverage workflows to generate the test matrix via a composite action parsing src/All.slnx.
• Update release workflow to pack/push/publish AOT binaries via direct dotnet commands; add new init/accept scripts (bash + PowerShell).

Reviewed changes

Copilot reviewed 33 out of 34 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Build.Pack.slnx	Adds a curated solution filter used for release-time dotnet pack.
init.sh	Rewrites initialization to dotnet restore + yarn (bash).
init.ps1	Adds PowerShell init script equivalent for Windows.
init.cmd	Removes legacy Windows CMD init entrypoint.
dictionary.txt	Adds terms related to the new tooling/scripts.
CONTRIBUTING.md	Updates contributor docs to reflect Nuke removal and new init flow.
build.sh	Removes Nuke-based build entrypoint (bash).
build.ps1	Removes Nuke-based build entrypoint (PowerShell).
build.cmd	Removes legacy CMD wrapper for build.
accept.sh	Rewrites snapshot acceptance script in bash (replaces Nuke target).
accept.ps1	Adds PowerShell snapshot acceptance script equivalent.
accept.cmd	Removes legacy Windows CMD accept entrypoint.
.nuke/parameters.json	Removes Nuke parameters file.
.gitignore	Removes ignores for Nuke-specific artifacts/auto-generated solutions.
.github/workflows/release.yml	Switches pack/push/publish to direct dotnet calls; adds template version stamping; updates AOT publish step.
.github/workflows/coverage.yml	Switches matrix generation to the composite action.
.github/workflows/ci.yml	Switches matrix generation to the composite action.
.github/actions/generate-test-matrix/action.yml	Adds composite action that builds the CI matrix from src/All.slnx.
.config/dotnet-tools.json	Removes Nuke global tool manifest.
.build/Helpers.cs	Removes Nuke helper utilities (deleted).
.build/Build.Version.cs	Removes Nuke version logic (deleted).
.build/Build.Tests.cs	Removes Nuke test/coverage orchestration (deleted).
.build/Build.Tests.2.cs	Removes Nuke test orchestration (deleted).
.build/Build.Sonar.cs	Removes Nuke Sonar integration (deleted).
.build/Build.slnx	Removes Nuke build solution filter (deleted).
.build/Build.Secrets.cs	Removes Nuke secret parameters (deleted).
.build/Build.Publish.cs	Removes Nuke pack/publish/publishaot targets (deleted).
.build/Build.Nitro.cs	Removes Nuke Nitro updater target (deleted).
.build/Build.GitHub.cs	Removes Nuke GitHub parameter plumbing (deleted).
.build/Build.Environment.cs	Removes Nuke build environment constants/paths (deleted).
.build/Build.csproj.DotSettings	Removes IDE settings tied to Nuke build project (deleted).
.build/Build.csproj	Removes Nuke build project itself (deleted).
.build/Build.cs	Removes Nuke entrypoint/targets (deleted).
.build/.editorconfig	Removes editorconfig scoped to Nuke build sources (deleted).

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[Copilot]

Pull request overview

Copilot reviewed 33 out of 34 changed files in this pull request and generated 1 comment.