feat(git): support custom commit flags for app-run commits

[0xnim]

Related to #274.

What Changed

• Added support for passing extra git commit flags
• Added a Settings field for app run git commit flags, so users can configure flags like --no-gpg-sign

Why

T3 Code runs git commit non-interactively. On a machine with global commit.gpgsign=true, commits can fail because GPG prompts for a pass on /dev/tty, which does not exist in this case.

This PR does NOT add interactive GPG/password support. Instead its a small workaround fix, users can configure extra commit flags for app run commits, which makes setups like --no-gpg-sign possible without changing their global git config

UI Changes

Adds a new Settings field under Git for extra git commit flags

Before	After

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

Note

Add custom git commit flags support to app-run commits

• Adds a gitCommitFlags string field to AppSettingsSchema and a commitFlags field to the GitRunStackedActionInput API contract, allowing users to pass arbitrary flags to git commit.
• Adds a settings UI in _chat.settings.tsx where users can configure and reset commit flags.
• The flags string is tokenized via a new tokenizeCommitFlags helper in GitManager.ts and injected into the git CLI args in GitCore.commit.
• GitActionsControl reads settings.gitCommitFlags and forwards it through the mutation chain to the backend when non-empty.

^{Macroscope summarized 55e0309.}

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[0xnim]

The worker errors seem to be pre existing

[juliusmarminge]

The worker errors seem to be pre existing

it's flaky right now but it keeps failing on this branch...

also can you resolve conflicts pls. i am unable to push since you PRd from main:

[0xnim]

Apologies, I never realized that was the reason you don't pr from main. I'll do it now.