Fix CI workflow: Add tree-sitter CLI installation and fix linting errors

vibeguard/cli/main.py

@@ -1,8 +1,5 @@
 """VibeGuard CLI main entry point."""
 
-import sys
-from typing import Any
-
 import click
 from rich.console import Console
 
@@ -44,7 +41,7 @@ def main(ctx: click.Context, verbose: bool, config: str | None, output: str) ->
 
     if verbose:
         console.print("[bold]VibeGuard[/bold] - AI Code Anti-Pattern Detector")
-        console.print(f"Version: 0.1.0")
+        console.print("Version: 0.1.0")
         console.print(f"Output format: {output}")
         console.print()