feat: add git-indicators widget

[dreamiurg]

Motivation

I wanted a way to see at a glance whether I have staged or unstaged changes in my git repo, but without the line counts that git-changes displays. My screen real estate is limited and I just need a quick visual indicator - not the full details.

Solution

This PR adds a new git-indicators widget that shows minimal git status indicators:

• + for staged changes (green when preserveColors is enabled)
• * for unstaged changes (red when preserveColors is enabled)

When there are no changes, the widget displays nothing, keeping the status line clean.

Configurability

• preserveColors (p keybind): When enabled, widget outputs hardcoded ANSI colors (green +, red *). When disabled, outputs plain text and user can set color via Edit Colors.
• hideNoGit (h keybind): When enabled, hides the widget entirely when not in a git repo (instead of showing empty space).

Example Configuration

{
  "id": "git-indicators",
  "type": "git-indicators",
  "preserveColors": true,
  "metadata": {
    "hideNoGit": "true"
  }
}

Changes

New Widget

• Add GitIndicatorsWidget in src/widgets/GitIndicators.ts
• Register widget in src/widgets/index.ts and src/utils/widgets.ts

Renderer Enhancement

The preserveColors property was already defined in the WidgetItem schema, but the renderer only honored it for custom-command widgets. I extended this to work with all widget types by removing the widget.type === 'custom-command' check. This allows any built-in widget to output ANSI color codes and have them preserved, rather than being stripped and replaced with the widget's color property.

Build Enhancement

Added prepare script to package.json so the TypeScript gets built when installing from GitHub via npx github:owner/repo.

Tests

• Add focused test suite (5 tests) covering core indicator logic, non-git-repo handling, ANSI color output, preview mode, and editor action handling

Testing

All 45 tests pass. Tested extensively on my machine - works great!