[FEATURE] TypoScript property escapeJsValue

The stdWrap property escapeJsValue allows content to be
included in JavaScript strings.

Resolves: #56642
Documentation: #56665
Releases: 6.2
Change-Id: I43f59889caec1a89970b94c93c93894d589243c9
Reviewed-on: https://review.typo3.org/28177
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers
Reviewed-by: Markus Klein
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert