mkdocs: Configure members_order as alphabetical in docstrings plugin

- Changed `members_order` in `mkdocstrings` from `source` to `alphabetical`
  for better organization and readability of API documentation.

Assisted-by: Codex

Author: datalogics-kam

mkdocs.yml

@@ -21,7 +21,7 @@ plugins:
             docstring_style: google
             heading_level: 2
             line_length: 50
-            members_order: source
+            members_order: alphabetical
             separate_signature: true
             show_signature_annotations: true
             signature_crossrefs: true