feat: Add option to truncate git branch names

[chmouel]

Added a new option @dracula-git-truncate-length to limit the maximum length of git branch names displayed in the status bar. This let truncate long branch names and not take the full length of the tmux window.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds a new configuration option @dracula-git-truncate-length to control optional truncation of git branch names in the status bar. The documentation is updated and the git script is modified to read and apply this truncation setting.

Changes

Cohort / File(s)	Summary
Documentation docs/CONFIG.md	Introduces new configuration option @dracula-git-truncate-length with description and usage example.
Git Script Implementation scripts/git.sh	Retrieves the git truncate length configuration value and applies branch name truncation in getMessage when the option is set.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• feat(): Show repo name status bar #349 — Also modifies scripts/git.sh's getMessage logic, so both PRs alter the same function for different branch display features.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding an option to truncate git branch names, which is clearly reflected in the code changes.
Description check	✅ Passed	The description is directly related to the changeset, explaining the new configuration option and its purpose for truncating long branch names.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@scripts/git.sh`:
- Around line 145-148: The branch truncation uses git_truncate_length without
validating it, so invalid values like 0, non-numeric, or negative cause
empty/incorrect slicing; update the logic around getBranch/branch handling to
validate git_truncate_length is a positive integer (e.g., regex '^[1-9][0-9]*$'
or an arithmetic check) before applying
branch="${branch:0:$git_truncate_length}", and if validation fails simply skip
truncation so branch remains intact (reference the checkForGitDir block and
variables branch, git_truncate_length, and repo_name to find and fix the code).

[ethancedwards8]

how long are your branches? lol

[chmouel]

@ethancedwards8 hah they are auto generated from the description of a pr/issue/jr so pretty long sometime 🙃