Enhance git branch with missing options

[jelmer]

Summary

The git branch command in dulwich is missing several useful options that are available in standard git.

Missing Options

• --all: List both remote-tracking and local branches
• --remotes: List only remote-tracking branches
• --merged: List branches that have been merged into the current branch
• --no-merged: List branches that have not been merged into the current branch
• --contains: List branches that contain a specific commit
• --sort: Sort branches by specified criteria (name, date, etc.)
• --column: Display branch list in columns
• --list: List branches matching a pattern
• --show-current: Show the current branch name
• --copy: Copy a branch
• --move: Move/rename a branch
• --edit-description: Edit the description of a branch

Benefits

These options would improve dulwich's git branch functionality by:

• Providing comprehensive branch listing capabilities with --all, --remotes, and filtering options
• Enabling branch management workflows with merge status checking via --merged and --no-merged
• Supporting advanced branch operations like copying and moving with --copy and --move
• Improving output formatting and usability with --column and --sort
• Adding branch metadata management with --edit-description

This would bring dulwich's branch command closer to feature parity with standard git and support more comprehensive branch management workflows.

[xifOO]

hi, @jelmer , can I try do this?

[jelmer]

@xifOO that would be great!

Please take a look at CONTRIBUTING.rst

I'd recommend creating a couple of smaller PRs (one per option?) rather than one big one.