Vitepress build

[hamishwillee]

This is vitepress build from mavlink/MAVSDK-docs#292 adjusted to deploy from MAVSDK repo. It adds the docs to build into /docs/ tree.

Still to do

• Fix up notes, tips, warnings - done as post process in Fix notes tips warnings in docs #2501
• Check/Fix the script for generating references so it doesn't have any cases of HTML element tags - looks OK
• Add access token for CI - done
• Test workflow action for building.
• Disable old repo

Not doing

• Make api ref docs in CI build into github docs tree (Julian to sort)

This can be tested locally by cloning, then from root doing:

yarn install
yarn start

Then view in browser.

[julianoes]

A few small comments. I think this will be good, thanks for that!

[sonarqubecloud]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[julianoes]

Let's try it!