[DOCS] Update docs based on TYPO3 version 12 and 13
[TASK] Migrate to native ignoreFlexFormSettingsIfEmpty property
[BUGFIX] Fix type error
[TASK] Refactor fluid template files
[TASK] Use new plugin signature return value
[TASK] Simplify static TypoScript include
[TASK] Remove deprecated TCEforms tag
[TASK] Establishing compatibility with v13