Refactor CLI and config handling, improve error propagation, and enha…

[MikeGarde]

…nce test coverage

• Replaced specific test file name with --ignored flag to run all tests
• Made branch field optional in CLI args with dynamic derivation from current branch
• Introduced anyhow::Result for better config loading error handling
• Exposed helper functions and made struct/enum fields public in git module
• Refactored main module imports and error handling with explicit ? operators
• Moved LLM client setup to setup module for better organization
• Added comprehensive tests for CLI parsing, config loading, Git operations, and core types
• Marked live LLM tests as ignored to prevent execution without actual LLM access
• Corrected spelling in prompt rules and reformatted assertions for readability

[Copilot]

Pull request overview

This PR refactors commitbot into a shared library + slimmer binary, improves error propagation (replacing panics with anyhow::Result), adjusts CLI/config behavior (notably branch handling), and expands integration/unit test coverage while preventing live LLM tests from running by default.

Changes:

• Introduce a src/lib.rs with shared types/exports; update src/main.rs to consume the library crate APIs.
• Refactor config loading and LLM client setup to return anyhow::Result and propagate errors via ?.
• Add/expand integration tests for CLI parsing, config resolution, git utilities, and core types; mark live LLM tests as ignored.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/prompt_live.rs	Marks live LLM tests as ignored so they don’t run in normal test suites.
tests/lib_types.rs	Adds coverage for core exported types (FileCategory, FileChange).
tests/git.rs	Adds integration tests for git parsing/formatting helpers and small utilities.
tests/config.rs	Adds integration tests for config resolution precedence and validation errors.
tests/cli_basics.rs	Extends CLI tests to validate Clap parsing into Command.
Taskfile.yaml	Updates task commands to run all tests and run ignored prompt tests explicitly.
src/setup.rs	Returns Result from build_llm_client and replaces panics with errors.
src/main.rs	Refactors binary to use commitbot library exports and improves error propagation.
src/llm/prompts.rs	Fixes spelling in prompt rules strings.
src/llm/ollama.rs	Re-formats assertions for readability in tests.
src/lib.rs	Adds new library crate surface (modules, re-exports, core types).
src/git.rs	Exposes helpers/types publicly and moves tests out to integration tests.
src/config.rs	Makes config resolution return Result and returns errors instead of panicking.
src/cli_args.rs	Makes branch optional and expands CLI help text/examples.

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