+ Add html block

• Update readme
• Code optimisations

Full Changelog: 2.5.7...2.6.1

Compatible with Sulu 2.6 and Symfony 6.4

Full Changelog: 2.5.8...2.6.0

- Fix sulu version

2.5.8

Merge branch 'release/2.5.8' into main

+ Add CI (cs fixer and phpstan)

2.5.7

Merge branch 'release/2.5.7' into develop