feat: Initialize monorepo structure and comprehensive documentation

This commit establishes the new monorepo architecture for the KROW Workforce platform.

Key changes include:
- Reorganized project into `frontend-web`, `mobile-apps`, `firebase`, `scripts`, and `secrets` directories.
- Updated `Makefile` to support the new monorepo layout and automate Base44 export integration.
- Fixed `scripts/prepare-export.js` for ES module compatibility and global component import resolution.
- Created and updated `CONTRIBUTING.md` for developer onboarding.
- Restructured, renamed, and translated all `docs/` files for clarity and consistency.
- Implemented an interactive internal launchpad with diagram viewing capabilities.
- Configured base Firebase project files (`firebase.json`, security rules).
- Updated `README.md` to reflect the new project structure and documentation overview.

firebase/firestore.rules

@@ -0,0 +1,12 @@
+rules_version = '2';
+
+service cloud.firestore {
+  match /databases/{database}/documents {
+    // Base rules: By default, lock down all access.
+    // Data Connect will operate with admin privileges from the backend
+    // and will not be subject to these client-side rules.
+    match /{document=**} {
+      allow read, write: if false;
+    }
+  }
+}