feat(licenses): enhance license validation and loading state management

- Added loading state management in the EnablePaidFeatures component to improve user experience during license validation.
- Updated validateLicense function to return detailed error messages for better feedback.
- Modified user API to return validation results instead of a boolean, enhancing error handling.
- Removed unused SQL files and updated package.json scripts for better development workflow.

apps/licenses/drizzle/meta/_journal.json

@@ -1,13 +1,5 @@
 {
   "version": "7",
   "dialect": "postgresql",
-  "entries": [
-    {
-      "idx": 0,
-      "version": "7",
-      "when": 1742369437742,
-      "tag": "0000_noisy_epoch",
-      "breakpoints": true
-    }
-  ]
+  "entries": []
 }