chore: relocate supporting docs files

[waymobetta]

• Remove supporting docs files (config + docusaurus framework)
• Add .github/workflow action

Closes: #1584

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[waymobetta]

@albttx I believe this PR is just waiting for a workflow to be added to the monorepo then we can relocate the Docusaurus framework files. Or is there only one workflow needed as introduced by your PR in the new docs repo?

[thehowl]

Superseded by #1801