Add commands for queue management (pause/resume/cancel)

[andi1984]

Priority: MEDIUM

Enhancement

Expose queue controls (pause/resume/cancel) as commands to give users more control over batch operations.

Why It Matters

Users currently have no way to control batch operations once started.

Implementation

1. Add commands to package.json:

{
  "commands": [
    {
      "command": "extension.pauseQueue",
      "title": "Pause Compression Queue",
      "category": "TinyPNG"
    },
    {
      "command": "extension.resumeQueue",
      "title": "Resume Compression Queue",
      "category": "TinyPNG"
    },
    {
      "command": "extension.cancelQueue",
      "title": "Cancel Compression Queue",
      "category": "TinyPNG"
    }
  ]
}

2. Make status bar clickable in QueueService:

private updateStatusBar(): void {
    // ... existing code
    this.statusBarItem.command = 'extension.pauseQueue';
    // ...
}

3. Implement the command handlers in src/commands/

Priority

MEDIUM - Feature enhancement for better UX