docs: Update MkDocs configuration with enhanced signature options

- Added `line_length`, `separate_signature`, `show_signature_annotations`,
  and `signature_crossrefs` options in `mkdocstrings` plugin configuration.
- Improves API documentation readability and presentation by better handling
  function signatures and annotations.

Assisted-by: Codex

Author: datalogics-kam

mkdocs.yml

@@ -19,7 +19,11 @@ plugins:
           options:
             docstring_style: google
             heading_level: 2
+            line_length: 50
             members_order: source
+            separate_signature: true
+            show_signature_annotations: true
+            signature_crossrefs: true
             show_source: false
             show_root_heading: true