Feature/composite editor

[tortmayr]

Add composite editor and upgrade framework

Add composite editor:

• Introduce new composite-editor package
• Register composite-editor as default open handler
• Composite editor shows different subeditors for the same file in a tabpanel and is enables for
  • Entities (Form/Code)
  • Relationships (Form/Code)
  • Systemdiagram (Diagarm/Code)
  • Mapping diagram (Diagram/Code)

Upgrade Frameworks:

• Update to GLSP 2.2.1 - the latest GLSP version

[github-actions]

Unit Test Results

 1 files  10 suites   37s ⏱️
71 tests 71 ✅ 0 💤 0 ❌
72 runs  72 ✅ 0 💤 0 ❌

Results for commit e4e83fd.

[tortmayr]

Known issues:

With the composite editor both the graphical/form and text editor are open at once.
Potentially also the properties view is currently open.
This causes sync issues on change and save

• Changes in the text editor are executed after every keyboard stroke -> this means the graphical editor could receive updates
  for an incomplete/faulty model
• Updates are not debounced -> text editing causes a lot of intermediate updates in the graphical editor
• The graphical diagram has its own commandstack that can get out of sync with a mix of graphical and texting
• Editing something essential in the text editor like the entity property/id of an entry can cause a crash of the graphical server
• For the form editor changes and undo/redo are only applied locally and synced with the model service on save

Side issue that should be fixed as part of the stabilization efforts

• The CSS of the form editor leaks into the main application and overrides things like font size and icon spacing
• -> Whenever a form editor is open the styling of the Theia application e.g. explorer view changes. Once closed its resets to the original values