Update tests and Documents
Summary:
- Update tests for new src structure
- Remove spaces from translated commands and update Grbl Tests
- Add missing emit info to AtCore
- Add more AtCoreTests
- Update base documents
- Documentation of atcorewidgets.
Reviewers: patrickelectric, tcanabrava, laysrodrigues
Reviewed By: patrickelectric, laysrodrigues
Subscribers: Atelier: AtCore
Tags: Atelier: AtCore
Differential Revision: https://phabricator.kde.org/D13241