feat(devx): Add Docusaurs versioning for docs

[lucas-tortora]

Description of change

This PR depends on #4554

Added versioning for the devnet and testnet.

TODO

After #4554 is merged, we need to modify the download docs step to download both network docs to fix the build.

Links to any relevant issues

Fixes #1431
Fixes #3114

Type of change

• Enhancement (a non-breaking change which adds functionality)

How the change has been tested

Docs were built locally.

Change checklist

Tick the boxes that are relevant to your changes, and delete any items that are not.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked that new and existing unit tests pass locally with my changes

[lucas-tortora]

Closed as it was deemed overkill for the time being.