Mini: Add Keyboard Shortcut for `Customize Appearance` Panel

[YYYasin19]

What problem does this solve?

Minor: I want to quickly rename the worktrees that I'm working on; right now I have to Right Click on Worktree > Customize Appearance > Enter New Title

Proposed solution

The option to set a keyboard shortcut for opening the Customize Appearance Panel - I can just enter the name and accept with Enter, no mouse needed.

Alternatives considered

No response

Supacode version

No response

Are you planning to build this yourself?

• I intend to open a pull request once this is approved and marked ready.

Before submitting

• I searched existing issues and this is not a duplicate.
• I understand feature pull requests are closed until the issue is marked ready.
• I agree to follow this project's Code of Conduct.

[github-actions]

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Please do not start any work or open a pull request until this issue is labeled ready. That label is a maintainer's go-ahead: a pull request opened against an issue that is not yet ready is labeled invalid until then. You will get a comment here the moment it is marked ready.

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