Add simplified env file copy script for worktrees

This script copies all .env files from ~/buster/buster to the current worktree,
ignoring gitignore rules to ensure actual .env files are copied (not just examples).
Unlike the existing move-env-to-worktree.ts script which respects gitignore,
this script is designed specifically for syncing environment files between worktrees.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/copy-env-files.ts

@@ -0,0 +1,78 @@
+#!/usr/bin/env tsx
+
+import { promises as fs } from 'node:fs';
+import { join, relative, dirname } from 'node:path';
+
+const SOURCE_REPO = join(process.env.HOME!, 'buster', 'buster');
+const TARGET_REPO = process.cwd();
+
+async function findEnvFiles(dir: string): Promise<string[]> {
+  const envFiles: string[] = [];
+  
+  async function walkDir(currentDir: string) {
+    try {
+      const entries = await fs.readdir(currentDir, { withFileTypes: true });
+      
+      for (const entry of entries) {
+        const fullPath = join(currentDir, entry.name);
+        const relativePath = relative(dir, fullPath);
+        
+        if (entry.isDirectory()) {
+          // Skip .git and node_modules directories
+          if (entry.name === '.git' || entry.name === 'node_modules') continue;
+          await walkDir(fullPath);
+        } else if (entry.name.startsWith('.env')) {
+          envFiles.push(relativePath);
+        }
+      }
+    } catch (error) {
+      // Skip directories we can't read
+      console.warn(`Skipping directory: ${currentDir}`);
+    }
+  }
+  
+  await walkDir(dir);
+  return envFiles;
+}
+
+async function copyEnvFiles() {
+  try {
+    console.info(`Searching for .env files in ${SOURCE_REPO}...`);
+    
+    const envFiles = await findEnvFiles(SOURCE_REPO);
+
+    if (envFiles.length === 0) {
+      console.warn('No .env files found in source repository');
+      return;
+    }
+
+    console.info(`Found ${envFiles.length} .env file(s):`);
+    envFiles.forEach(file => console.info(`  - ${file}`));
+
+    console.info('\nCopying files...');
+
+    for (const envFile of envFiles) {
+      const sourcePath = join(SOURCE_REPO, envFile);
+      const targetPath = join(TARGET_REPO, envFile);
+      const targetDir = dirname(targetPath);
+
+      try {
+        await fs.mkdir(targetDir, { recursive: true });
+        
+        const content = await fs.readFile(sourcePath, 'utf-8');
+        await fs.writeFile(targetPath, content);
+        
+        console.info(`  ✓ Copied ${envFile}`);
+      } catch (error) {
+        console.error(`  ✗ Failed to copy ${envFile}: ${error instanceof Error ? error.message : 'Unknown error'}`);
+      }
+    }
+
+    console.info('\nDone! All .env files have been copied to the worktree.');
+  } catch (error) {
+    console.error('Error:', error instanceof Error ? error.message : 'Unknown error');
+    process.exit(1);
+  }
+}
+
+copyEnvFiles();