Add GitIntegration class for metadata and hooks

Implement Git integration for adding metadata and installing hooks.

vscode-extension/src/git/gitIntegration.ts

@@ -0,0 +1,45 @@
+import * as vscode from 'vscode';
+import { execSync } from 'child_process';
+import { AnalysisResult } from '../analysis/analyzer';
+
+export class GitIntegration {
+    public async addMetadata(
+        file: string,
+        analysis: AnalysisResult
+    ): Promise<void> {
+        // Store analysis in git notes
+        const metadata = {
+            ailint_version: '0.1.0',
+            confidence: analysis.confidence,
+            components: analysis.components,
+            timestamp: analysis.timestamp
+        };
+        
+        const metadataJson = JSON.stringify(metadata);
+        
+        // Add to git notes
+        try {
+            execSync(
+                `git notes --ref=ailint add -f -m '${metadataJson}' HEAD`,
+                { cwd: vscode.workspace.rootPath }
+            );
+        } catch (error) {
+            console.error('Failed to add git notes:', error);
+        }
+    }
+    
+    public async installHook(): Promise<void> {
+        // Install pre-commit hook
+        const hookPath = `${vscode.workspace.rootPath}/.git/hooks/pre-commit`;
+        const hookContent = `#!/bin/bash
+# AILint pre-commit hook
+# Analyzes staged changes for AI influence
+
+ailint analyze --staged --format=git-notes
+`;
+        
+        // Write hook file
+        // Make executable
+        // etc.
+    }
+}