See c2bb63bead for further details.
The README.md should mostly only cover the abstract and links.
The composer commands are the core value of this extension. List
all commands in the documentation and copy the descriptions from
the `composer.json`. This lets the global search at docs.typo3.org
find these commands.
Remove superfluous Linters page, which is integrated now in the
Running page.
Use sentence case in page titles in order to conform to the
TYPO3 documentation standards.
The ambiguous :ts: text role has been removed to
not confuse the writer with typescript and typoscript.
Add the common extension destinations to `composer.json`.
(Packagist displays them in a prominent place.)
