Manually mantained page history

[cvvergara]

Currently each .rst file has:

* **Supported versions:**
  `Latest <https://docs.pgrouting.org/latest/en/aStar-family.html>`__
  (`3.5 <https://docs.pgrouting.org/3.5/en/aStar-family.html>`__)
  `3.4 <https://docs.pgrouting.org/3.4/en/aStar-family.html>`__
  `3.3 <https://docs.pgrouting.org/3.3/en/aStar-family.html>`__
  `3.2 <https://docs.pgrouting.org/3.2/en/aStar-family.html>`__
  `3.1 <https://docs.pgrouting.org/3.1/en/aStar-family.html>`__
  `3.0 <https://docs.pgrouting.org/3.0/en/aStar-family.html>`__
* **Unsupported versions:**
  `2.6 <https://docs.pgrouting.org/2.6/en/aStar-family.html>`__
  `2.5 <https://docs.pgrouting.org/2.5/en/aStar-family.html>`__
  `2.4 <https://docs.pgrouting.org/2.4/en/aStar-family.html>`__

Which gets complicated to maintain when pumping up versions.

• Improve by creating a function that generates the necessary code for the history of the pages
• main branch does not have the latest, so the website.yml should push on "main" directory

After this is merged:

• port changes to develop branch

note: Not changing documentation of older versions: aka 3.4 & under
For the future....
For the website to look consistent,

• manually remove the existing menu
• manually add the function call to older versions