[1SP] UI/UX Documentation

[RalphSteinhagen]

Document OpenDigitizer UI/UX requirements based on the Belgrade workshop outcomes and create 'Paul' & 'Susan' personas documentation.

Key References:

• Belgrade Workshop
  • [10pt,7pt] Detailed Project Planning & UX Workshop for CALL#4 (Belgrade) #99
  • [8pt,8pt] UI: UX design analysis - plug-in and component definitions required for the digitizer UI, etc. #21
• @bbalazs UI Concepts/Mockups: [0pt/5pt] UX Mockups #39
• @dantti iterations on this: [5SP;3.5SP] UI: Implement the new UI look #201

Goal:

• one (or more) MD documents in the UI repo to document and guide concepts also for new developers that want/need to contribute.

... please add pertinent information here, below, or directly as part of the PR.