refactor: Replace TypeScript bootstrap with bash dependency checks

Simplified dependency installation by moving from TypeScript runtime bootstrap to bash-based checks in plugin manifest. This reduces complexity and code size while maintaining the same functionality.

Changes:
- Added bash conditional dependency checks to all 5 hooks in hooks.json
- Check runs before each hook: [ ! -d "${CLAUDE_PLUGIN_ROOT}/scripts/node_modules" ] && cd "${CLAUDE_PLUGIN_ROOT}/scripts" && npm install || true
- Reverted all hook TypeScript files to use simple static imports (removed dynamic imports)
- Removed src/shared/bootstrap.ts (44 lines)
- Removed ensureDependencies() calls from all hook entry points

Benefits:
- Simpler architecture using native bash instead of TypeScript
- Net reduction of 157 lines of code
- No runtime overhead when dependencies already installed
- Uses plugin manifest's command hook feature as intended
- Faster and more efficient

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

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

src/shared/bootstrap.ts

@@ -1,44 +0,0 @@
-import { execSync } from 'child_process';
-import { existsSync } from 'fs';
-import { join } from 'path';
-
-/**
- * Bootstrap function to ensure dependencies are installed
- * This runs on first hook execution after plugin installation from GitHub
- *
- * When installed via GitHub Marketplace, files are downloaded but npm install
- * doesn't run automatically. This function checks for node_modules and installs
- * dependencies if needed.
- */
-export function ensureDependencies(): void {
-  try {
-    // Get plugin root from environment variable
-    const pluginRoot = process.env.CLAUDE_PLUGIN_ROOT;
-    if (!pluginRoot) {
-      console.error('[bootstrap] CLAUDE_PLUGIN_ROOT not set, skipping dependency check');
-      return;
-    }
-
-    const scriptsDir = join(pluginRoot, 'scripts');
-    const nodeModulesPath = join(scriptsDir, 'node_modules');
-
-    // Check if dependencies are already installed
-    if (existsSync(nodeModulesPath)) {
-      return; // Already installed
-    }
-
-    console.error('[bootstrap] Installing dependencies in plugin/scripts...');
-
-    // Install dependencies using npm
-    execSync('npm install', {
-      cwd: scriptsDir,
-      stdio: 'inherit', // Show install progress
-      timeout: 60000 // 60 second timeout
-    });
-
-    console.error('[bootstrap] Dependencies installed successfully');
-  } catch (error) {
-    console.error('[bootstrap] Failed to install dependencies:', error instanceof Error ? error.message : error);
-    // Don't throw - allow hook to continue, it will fail on import but with clearer error
-  }
-}