[BUGFIX] Changelog docs compile warnings

Fix a series of ReST documentation compile warnings, some of them
lead to missing segments in the rendered docs. Most notable changes:

* Always have an empty line after '.. code-block:: <highlight-indicator>'
* Introduce inline text role ":javascript:" and use it consistently over
  ":js:", but give it the same HTML class "js" during rendering. This is
  because highlight code-block existists for "javascript", too, so this
  can now be used both in blocks as well as inline
* Introduce inline text role ":sql:", can now be used inline, too, in
  addition to code-block
* Various minor things like indentings in numerations, some broken
  tables, ...

Change-Id: Id9c16257a76623dc9ee292253450865b95e13dc3
Resolves: #83313
Releases: master
Reviewed-on: https://review.typo3.org/55063


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>