Add git worktree support

[ArthurHeymans]

• I added a entry in changelog under unreleased section.

Add git worktree support for workspace and config discovery

• Add new eca.git namespace with utilities for detecting git roots and worktrees
• Update config loading to fall back to git root when no workspace folders provided
• Update initialize handler to use git root as workspace folder fallback
• Fix test isolation by mocking config/get-env in provider-api-key test
• Add comprehensive tests for git utilities and config fallback behavior

Signed-off-by: Arthur Heymans arthur@aheymans.xyz

[zikajk]

What problem does it solve? Thank you

[ArthurHeymans]

What problem does it solve? Thank you

I have a git worktree inside a git directory, let's say .worktree/feature_x. Previously eca would then operate on the root worktree rather than the feature_x worktree.

[ericdallo]

Please create issues before PRs for things we should discuss before, this avoids re-work
Not sure I agree with this one, workspace roots are client responsibilities for some reasons, because each client handle workspace roots diferently.
I wonder if one can solve that starting eca with different workspace roots like it already supports