[Feature] CI: Implemented automated build and deployment of docs to `gh-pages` using GitHub Actions (Fixes #7)

[abhiTronix]

Brief Description

This PR will implement building and deploying DeFFcode docs automatically on gh-pagesthrough GitHub Actions workflow.

Changes

• ✨ Implement new automated Docs Building and Deployment on gh-pages through GitHub Actions workflow:
  • 👷 Added new workflow yaml docs_deployer.yml for automated docs deployment.
  • 👷 Added different jobs with ubuntu-latest environement to build matrix.
  • 👷 Added actions/checkout@v2 for repo checkout and actions/setup-python@v2 for python environment.
  • 📌 Pinned python version to 3.8 for python environment in docs building.
  • 🎨 Added GIT_TOKEN, GIT_NAME, GIT_EMAIL environment variables through secrets.
  • ➕ Added Mkdocs Material theme related python dependencies and environments.
  • ✨ Added push on master and dev branch release with published as triggers.
  • 📌 Pinned mkdocstrings==0.17.0.
• ✨ Added new Automated Docs Versioning:
  • ⚗️ Implemented Docs versioning through mike.
  • 👷 Separate new workflow steps to handle different versions.
  • ⚡️ Added step to auto-create RELEASE_NAME environment variable from DeFFcode version file.
  • 👷 Update docs deploy workflow to support latest, release and dev builds.
  • 👷 Added automatic release version extraction from GitHub events.
• 📝 Docs: Re-aligned text and images in README.md
• ✨ Maintenance: Added new FUNDING.yml with ko-fi donation link.

Related Issue

7

Context

This PR will implement of automated building of Deffcode Docs through GitHub actions Workflow which then hosted on GitHub Pages.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to change)