chore: migrate from gopkg.in/yaml.v3 to go.yaml.in/yaml/v3 (#454)

* chore: migrate from gopkg.in/yaml.v3 to go.yaml.in/yaml/v3

Replace deprecated gopkg.in/yaml.v3 import path with the new canonical
go.yaml.in/yaml/v3 path across the codebase. This migration ensures
compatibility with modern Go toolchain and dependency management.

Changes include:
- Update yaml import path in discovery, generate-gnostic, and tools
- Upgrade Go version from 1.12 to 1.24.5
- Update dependencies: protobuf (1.36.6), gnostic-models (0.7.0), go-cmp (0.6.0)
- Modernize code style with implicit struct literals and short variable declarations
- Regenerate protobuf code with latest protoc-gen-go (1.36.6) and protoc (5.29.3)
- Add performance optimizations using unsafe package in generated code

This maintains backward compatibility while adopting the supported import path
for yaml.v3 library going forward.

* sync

* sync

* fix: improve code quality and security in plugins environment

- Use proper format string in fmt.Fprintf to prevent format string vulnerabilities
- Update file permissions to modern octal syntax (0755 -> 0o755)
- Fix comment spacing to follow Go style conventions

These changes address static analysis warnings and improve code maintainability
while maintaining the same functionality.

* refactor: improve code quality and use modern Go APIs

- Remove unnecessary fmt.Sprintf calls for static error messages in OpenAPIv3
- Replace deprecated strings.Replace(-1) with strings.ReplaceAll for clarity
- Simplify string formatting where no placeholders are used

These changes improve code readability, performance, and follow modern Go
best practices while maintaining identical functionality.

* chore: update dependencies and regenerate protobuf files

Update Go dependencies to latest versions:
- golang.org/x/tools: v0.35.0 → v0.36.0
- google.golang.org/protobuf: v1.36.6 → v1.36.7
- google.golang.org/genproto: updated to 20250811160224
- golang.org/x/mod: v0.26.0 → v0.27.0
- golang.org/x/net: v0.42.0 → v0.43.0
- golang.org/x/text: v0.27.0 → v0.28.0

Regenerate protobuf files with protoc-gen-go v1.36.7 to reflect
the updated dependency versions.

This maintenance update ensures the project uses the latest stable
versions of its dependencies with security fixes and improvements.

fix: Stop lying how GRPC renders durations (#401)

by reporting the data types and formats that are actually used

Fixes: #351

Fix/openapiv3 go package (#344)

fix openapiv3 proto go_package to "github.com/google/gnostic/openapiv3;openapi_v3"

Add missing generated code to support export of maps of strings. (#333)

Support $ref alongside description in OpenAPI V3 (#314)

* Support  with description in OpenAPI V3 proto
* Fix proto generation

Support $ref alongside description in OpenAPI V3 (#314)

* Support  with description in OpenAPI V3 proto
* Fix proto generation

Remove multi module again (#295)

Should be tagged as v0.6.6

Retract sub modules again (#294)

This should be tagged as v0.6.5

Remove multi module (#289)

* Retract breaking multi-module commit

This commit should be tagged as v0.6.3

* Remove retracting go.mod files

This commit should be tagged as v0.6.4

Retract breaking multi-module commit (#288)

This commit should be tagged as v0.6.3