mkdocs to docusaurus

[joshuafernandes]

Pull request checklist

Major changes to switch mkdocs -> docusaurus

Before creating the pull request

Make sure that:

• All commits in this PR are signed off for the DCO.
• You've read the contribution guidelines.
• You've previewed your changes locally.

Describe the change

• Removing mkdocs and switching to docusaurus
• Removing old versions from the versions list (still available as code though)
• updating to use GHA
• will need to be set to use github pages

Impacted parts

For content changes:

• Documentation content
• Documentation page organization

For tool changes:

• Github Actions workflow
• Build and QA tools configuration (for example, lint rules or Vale style)
• MkDocs templates
• MkDocs configuration
• Python dependencies
• Node dependencies and JavaScript
• Read the Docs configuration
• GitHub integration

After creating your PR and tests have finished

Make sure that:

• You've fixed any issues raised by the tests.
• You've previewed your changes on Read the Docs
  and added a preview link.

Preview