This patch merges the "t3editor" extension into EXT:backend. The
overall benefit is a globally available syntax highlighting at various
places, without the need to have an extra extension installed.

Another benefit it the removal of installation checks of EXT:t3editor
and fallbacks if the "soft requirement" is not fulfilled, reducing
soft-cross-dependencies.

Resolves: #102440
Releases: main
Change-Id: I76301c9cff08f61a5721fa34f4e3e950687b67b0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81799


Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>

Outdated manuals which are not supported anymore are removed.
The missing system extensions manuals are added.

Some special cases:
- t3install was renamed to t3upgrade (as the Installation Guide
  was also renamed to Upgrade Guide)
- t3l10n and t3translate are duplicates, t3l10n was removed

The current list of manuals is maintained in
https://github.com/TYPO3-Documentation/TYPO3CMS-Example-ExtensionManual

Resolves: #102035
Releases: main, 12.4
Change-Id: I344f8a17d1c5de9dbcdc5148bed5322518d72b0c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81218


Tested-by: Lina Wolf <112@linawolf.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Lina Wolf <112@linawolf.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>

Resolves: #99542
Releases: main, 11.5
Change-Id: Ifa05cc27825bc4c89dd9b08f66c03505270fd815
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77388


Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Tested-by: Josef Glatz <josefglatz@gmail.com>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Chris Müller <typo3@krue.ml>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Chris Müller <typo3@krue.ml>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

Resolves: #99299
Releases: main, 11.5
Change-Id: I1b4e7d16cf32bfbcda757685c8b3759bb052a867
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76998


Reviewed-by: Lina Wolf <112@linawolf.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Lina Wolf <112@linawolf.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>

- align README.rst, Index.rst, Includes.txt, Includes.rst.txt,
  Settings.cfg
- add genindex.rst, Sitemap.rst
- remove outdated Targets.rst
- rename Includes.txt to Includes.rst.txt
- reference manual's start page with :doc:`<manual>:Index`

Adding the custom label `start` to the beginning of the manual's
Index.rst is redundant. Use :doc:`<manual>:Index` instead of
:ref:`<manual:start>` to refer to it.

- replace :ts: with :typoscript: text role

The ambiguous :ts: text role has been removed to
not confuse the writer with typescript and typoscript.

- fix rendering warnings of EXT:core
- fix rendering warnings of EXT:dashboard
- fix rendering warnings of EXT:fluid_styled_content
- fix rendering warnings of EXT:form
- fix rendering warnings of EXT:linkvalidator

- remove outdated encoding note
- align reST validator at Build/Scripts/validateRstFiles.php

See https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/GeneralConventions/FileStructure.ht...

* Adjusts all configuration files using the main branch
  instead of master
* Makes all "Edit on Github" links in the Changelog and
  System Extension manuals work again after master -
  main switch.
* Fixes all link to Github or Docs using the path
  containing main instead of master

Resolves: #96138
Releases: main, 11.5, 10.4
Change-Id: Ifde73dd2bb8efdbf54eb2ba7625d6f201de9bd11
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72382


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>

The GitHub main repository has been renamed from "TYPO3/TYPO3.CMS"
to "typo3/typo3".

The new URL is https://github.com/typo3/typo3

This change reflects all places in TYPO3 Core to adapt to this
renaming.

Resolves: #94639
Releases: master, 10.4, 9.5
Change-Id: Ia5c3136a48b8b4580283277da4b7b11768c32132
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70092


Tested-by: core-ci <typo3@b13.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Benni Mack <benni@typo3.org>

This change should allow users to:
*  Discover the extension via docs.typo3.org
*  Allow different target groups like administrator,
   integrator and editor to get an idea about the feature
   set and how to use the extension.

Resolves: #93260
Releases: master, 10.4
Change-Id: I90a8f356231cc49baf3c8fbedd9625300827c094
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/68908


Tested-by: Daniel Siepmann <coding@daniel-siepmann.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Daniel Siepmann <coding@daniel-siepmann.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>