Translation framework: investigate new Transifex-Github integration

[kd-ods]

It looks like this new integration might take some of the technical legwork out of managing translations: https://docs.transifex.com/transifex-github-integrations/github-tx-ui

We are also developing on the main branch now, and only creating release branches at the point of releasing a new version of the standard. So this might mean we can have a permanent Transifex project set up to sync with the main branch.

The implications or issues with moving to use of the Transifex-GitHub integration should be investigated, so that we can can decide whether to stick with the status quo or not.