Replace static parsing of source files with dynamic import from library when extracting symbols

PR Summary

Updated the semgrep version Upgraded to version v1.14.0 for improved code analysis
Added api_docs_helper file This file contains helper functions for generating API docs from docstrings and annotations of symbols, making documentation easier to create and maintain
Modified mkdocstring configs Changed the output format to markdown files for better compatibility with the mdx format
Fixed bugs related to union types handling Improved parsing of function signatures and type annotations involving union types
Changed default value for show_root_toc entry Avoids duplicate appearance of root level entries on the documentation page
Typo fixes and updates in mkdocs and docstring files Enhanced overall documentation quality
Added a new dependency: docstring-parser Provides better support for parsing docstrings
Updated the version number Incremented to 0.5.0rc0 to reflect the new features and improvements
Fixed symlinks in notebooks Ensured that links correctly point to the appropriate documentation pages when using relative links