Finalize deployment to gh-pages

[dalito]

• describe where to find the xlsx-file that matches the current SKOS/turtle-vocabulary version (see README.md)
• describe where to find the pyLODE-generated HTML-documentation for the current vocabulary version (see README.md)
• construct url with version for formerly released versions of the vocabulary. Whenever a new version is tagged the deployment should use the version in the url. This requires another pipeline triggered by a new tag on main.

[dalito]

A solution will be possible with the next minor release 0.7.0 of voc4cat-tool & some pipeline-updates here.

The gh-pages branch will have the following structure:

dev/
  vocab1/
    0000001.ttl
    0000002.ttl
    ...
    index.html (pylode docs)
  vocab1.ttl
  vocab1.xlsx

  vocab2/
    ... (as in vocab1)
  vocab2.ttl
  vocab2.xlsx

  ... (more vocabularies)

latest/  (latest release)
  ... (same sub structure as dev)

v2023-08-14/  (latest release)
  ... (same sub structure as dev)

v2023-08-10/  (2nd latest release)
  ... (same sub structure as dev)

... (older released versions)

For a new release, latest will be overwirtten with the new release. In addition a copy is written to a folder which is named as the release-tag.