feat: add documentations with mkdocs

[hudsonbrendon]

This pull request introduces several changes to enhance the documentation and setup for the Python Solar Plus Intelbras project. The most important changes include adding badges to the README.md, setting up documentation with MkDocs, and updating dependencies.

Enhancements to documentation and setup:

• README.md: Added badges for Python package status, Dependabot updates, and GitHub Pages build status. Included installation instructions, usage examples, features list, and contribution guidelines.
• docs/index.md: Created a documentation index with auto-generated API documentation using mkdocstrings.
• mkdocs.yml: Configured MkDocs with the Material theme, custom fonts, and various markdown extensions to improve the documentation site.

Dependency updates:

• pyproject.toml: Added dependencies for MkDocs, MkDocs Material theme, pymdown-extensions, and mkdocstrings to support the new documentation setup.