feat: enhance .npmignore and config.py for better development environment management; update package.json for improved build process; add prepublish-clean script to remove unnecessary artifacts

ccw/scripts/prepublish-clean.mjs

@@ -0,0 +1,32 @@
+#!/usr/bin/env node
+/**
+ * Pre-publish cleanup - removes dev artifacts from directories
+ * that will be included in the npm package via the "files" field.
+ */
+import { globSync } from 'glob';
+import { rmSync } from 'fs';
+
+const patterns = [
+  'ccw/scripts/__pycache__/**',
+  'ccw/dist/.ace-tool/**',
+  'ccw/src/.ace-tool/**',
+  'codex-lens/src/**/__pycache__/**',
+  'ccw-litellm/src/**/__pycache__/**',
+  'codex-lens/src/**/.workflow/**',
+  '**/.workflow/.cli-history/*.db*',
+];
+
+let cleaned = 0;
+for (const pattern of patterns) {
+  const files = globSync(pattern, { ignore: 'node_modules/**', dot: true });
+  for (const f of files) {
+    try {
+      rmSync(f, { force: true });
+      cleaned++;
+    } catch { /* skip */ }
+  }
+}
+
+if (cleaned > 0) {
+  console.log(`[prepublish-clean] Removed ${cleaned} dev artifacts`);
+}