Add Google Drive authorization processing and error handling templates

- Implemented `google_drive_callback.html` for processing Google Drive authorization, including UI for success and error states.
- Added JavaScript functionality for exchanging authorization codes, saving settings, and handling folder selection.
- Created `google_drive_callback_error.html` to display error messages during the authorization process.

app/utils/config_validator/masking.py

@@ -0,0 +1,12 @@
+"""
+Module for masking sensitive information in configuration values
+"""
+
+def mask_sensitive_value(value):
+    """
+    Masks sensitive values like API keys in logs and output
+    """
+    # Return masked value for sensitive data
+    if value and isinstance(value, str) and len(value) > 8:
+        return value[:4] + "*" * (len(value) - 4)
+    return value