refactor: remove modules system from core package

- Remove all module-related entry points from package.json exports
- Remove module source files from tsup build configuration
- Clean up external dependencies related to modules
- Update DEV.md to reflect modules removal from architecture
- Clarify package description to specify Next.js CMS

tsup.config.js

@@ -23,17 +23,6 @@ export default defineConfig([
       'src/core/storage/index.js',
       'src/core/toast/index.js',
       'src/features/provider/index.js',
-      'src/core/modules/index.js',
-      'src/core/modules/client.js',
-      'src/modules/index.js',
-      'src/modules/init.js',
-      'src/modules/pages.js',
-      'src/modules/modules.metadata.js',
-      // Module actions, API, CRUD and server-only config (bundled to resolve relative imports)
-      'src/modules/*/actions.js',
-      'src/modules/*/api.js',
-      'src/modules/*/crud.js',
-      'src/modules/*/config.js',
       'src/shared/lib/metadata/index.js',
       'src/shared/lib/logger.js',
     ],
@@ -42,7 +31,7 @@ export default defineConfig([
     splitting: false,
     sourcemap: false,
     clean: true,
-    external: ['react', 'react-dom', 'next', 'pg', 'dotenv', 'dotenv/config', 'resend', '@react-email/components', 'node-cron', 'readline', 'crypto', 'url', 'fs', 'path', 'net', 'dns', 'tls', '@zen/core/api', '@zen/core/cron', '@zen/core/database', '@zen/core/email', '@zen/core/email/templates', '@zen/core/storage', '@zen/core/toast', '@zen/core/modules/actions', '@zen/core/modules/storage', '@aws-sdk/client-s3', '@aws-sdk/s3-request-presigner'],
+    external: ['react', 'react-dom', 'next', 'pg', 'dotenv', 'dotenv/config', 'resend', '@react-email/components', 'node-cron', 'readline', 'crypto', 'url', 'fs', 'path', 'net', 'dns', 'tls', '@zen/core/api', '@zen/core/cron', '@zen/core/database', '@zen/core/email', '@zen/core/email/templates', '@zen/core/storage', '@zen/core/toast', '@aws-sdk/client-s3', '@aws-sdk/s3-request-presigner'],
     noExternal: [],
     bundle: true,
     banner: {
@@ -64,9 +53,6 @@ export default defineConfig([
       'src/features/auth/page.js',
       'src/features/admin/page.js',
       'src/features/admin/navigation.server.js',
-      'src/modules/page.js',
-      'src/modules/modules.actions.js',
-      'src/modules/modules.storage.js',
     ],
     format: ['esm'],
     dts: false,
@@ -85,10 +71,6 @@ export default defineConfig([
       '@zen/core/admin/actions',
       '@zen/core/admin/navigation',
       '@zen/core/toast',
-      '@zen/core/core/modules',
-      '@zen/core/modules/pages',
-      '@zen/core/modules/actions',
-      '@zen/core/modules/metadata',
     ],
     bundle: false, // Don't bundle these files
     esbuildOptions(options) {