[FEATURE] Reactions - Incoming WebHooks for TYPO3

This feature adds the possibility to receive incoming webhooks
into a TYPO3 instance.

This feature allows everybody to provide additional value for
any TYPO3 instance.

With the new system, a basic reaction is added, which allows
to create new records.

Extension authors are able to add their own reaction types
by implementing the ReactionInterface and adding corresponding
TCA configuration.

Used command(s)
  > composer req "symfony/uid:^6.2"
  > composer update typo3/testing-framework

Resolves: #98373
Releases: main
Change-Id: Ia0413c3951eca7cf05b6f28bb4743ce060639d5b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75482


Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Frank Nägler <frank.naegler@typo3.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Andreas Wolf <andreas.wolf@typo3.org>
Reviewed-by: Frank Nägler <frank.naegler@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Susanne Moog <look@susi.dev>