New features

First release

* Refactoring
* Add wrapper and item class for tables and videos, not only wrapper.
* Integration with embed field module.

• feat(validation): Add field validation (issue #2204309: Add field validation rules by Taran2L)
• refactor: Move some files around, rename base formatter class

• Issue #2779087 by rogical: Add config link
• Issue #2840432 by gmaltoni: Coding Standards
• Issue #2633220 by Amermod, Jamesap: Verbs and activity types fixed
• [PILOT-2155] Integrate xAPI for h5p quizzes.

- Fixing bug: Renamed the shariff block template because of a template naming collision, so please rebuild the cache after updating.
- Fixing bug: Load right library version for shariff fields.
- Feature: Adding libraries support.
- Feature: Update supported services: Weibo, Tencent-Weibo, Qzone.

- New configurable prompt messages
- Bug fixes