Add Moodle data source integration (#11325)

### What problem does this PR solve?

This PR adds a native Moodle connector to sync content (courses,
resources, forums, assignments, pages, books) into RAGFlow.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

web/src/pages/user-setting/data-source/index.tsx

@@ -44,6 +44,12 @@ const dataSourceTemplates = [
     description: DataSourceInfo[DataSourceKey.NOTION].description,
     icon: DataSourceInfo[DataSourceKey.NOTION].icon,
   },
+  {
+    id: DataSourceKey.MOODLE,
+    name: DataSourceInfo[DataSourceKey.MOODLE].name,
+    description: DataSourceInfo[DataSourceKey.MOODLE].description,
+    icon: DataSourceInfo[DataSourceKey.MOODLE].icon,
+  },
   {
     id: DataSourceKey.JIRA,
     name: DataSourceInfo[DataSourceKey.JIRA].name,