refactor: consolidate all Node.js development into lib package

- Move scripts/ to lib/scripts/ and convert to ESM modules
- Consolidate dependencies: add live-server to lib/package.json
- Remove root package.json and node_modules split
- Preserve CLI integration via existing rebuild-library.sh
- Add development quickstart guide for new unified workflow
- Clean up outdated file references and duplicate assets

scripts/build.js

@@ -1,58 +0,0 @@
-#!/usr/bin/env node
-
-/**
- * Build script for Insertr library and CLI integration
- * This ensures the CLI always has the latest library version embedded
- */
-
-const { execSync } = require('child_process');
-const fs = require('fs');
-const path = require('path');
-
-console.log('🔨 Building Insertr library and CLI...\n');
-
-// 1. Build the library
-console.log('📦 Building JavaScript library...');
-try {
-    execSync('npm run build', { cwd: './lib', stdio: 'inherit' });
-    console.log('✅ Library built successfully\n');
-} catch (error) {
-    console.error('❌ Library build failed:', error.message);
-    process.exit(1);
-}
-
-// 2. Copy built library to CLI assets
-console.log('📁 Copying library to CLI assets...');
-const srcDir = './lib/dist';
-const destDir = './insertr-cli/pkg/content/assets';
-
-// Ensure destination directory exists
-fs.mkdirSync(destDir, { recursive: true });
-
-// Copy files
-const files = fs.readdirSync(srcDir);
-files.forEach(file => {
-    const src = path.join(srcDir, file);
-    const dest = path.join(destDir, file);
-    fs.copyFileSync(src, dest);
-    console.log(`  ✅ Copied ${file}`);
-});
-
-console.log('📁 Assets copied successfully\n');
-
-// 3. Build the CLI
-console.log('🔧 Building Go CLI...');
-try {
-    execSync('go build -o insertr', { cwd: './insertr-cli', stdio: 'inherit' });
-    console.log('✅ CLI built successfully\n');
-} catch (error) {
-    console.error('❌ CLI build failed:', error.message);
-    process.exit(1);
-}
-
-console.log('🎉 Build complete!\n');
-console.log('📋 What was built:');
-console.log('  • JavaScript library (lib/dist/)');
-console.log('  • Go CLI with embedded library (insertr-cli/insertr)');
-console.log('\n🚀 Ready to use:');
-console.log('  cd insertr-cli && ./insertr --help');