fix(server): parse git branches correctly when column.ui is enabled

[EDM115]

What Changed

Added the --no-column flag to git operations that support it (git branch only here, if you ever use git tag at some point to list them, you'll need to add that too).
Reference : https://git-scm.com/docs/git-column

Why

Users (like myself) can have the setting column.ui set to always in their .gitconfig (for better readability), but this messes up with the branch parsing in t3code.

As you can see here, branches are put here "as-is", even tho they should be in separated lines.
Currently it parses go-bin copilot/rewrite-cli-in-rust as one branch while they are two separate ones. The --no-column flag fixes that :

UI Changes

None.

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

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Note

Low Risk
Low risk: only adjusts git branch invocation flags to stabilize stdout formatting; behavior changes are limited to branch listing/name discovery.

Overview
Fixes branch parsing when users have column.ui enabled by adding --no-column to all git branch calls used for listing branches.

This updates both listBranches (local + --remotes) and listLocalBranchNames so downstream logic (e.g. feature-branch auto-naming) receives one-branch-per-line output consistently.

^{Written by Cursor Bugbot for commit 3fc1fdd. This will update automatically on new commits. Configure here.}

Note

Fix git branch parsing in listBranches and listLocalBranchNames when column.ui is enabled

When git's column.ui config is enabled, git branch formats output in columns, breaking line-by-line branch name parsing. Adding --no-column to all git branch invocations in GitCore.ts ensures output is always single-column regardless of user git config.

^{Macroscope summarized 3fc1fdd.}

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