videoinput: API refactoring

• add new daemon APIs
• SIPCall refactoring to use new VideoInput (To be detailed)

added 2 designs

assigned to @aberaud

added 2 designs

added to epic &37 (closed)

Nice design images. Not sure what program you are using; however, you might be interested in Gaphor. Thank you

added SprintIn progress label

mentioned in commit 517f6299

added SprintDone label and removed SprintIn progress label

closed

removed SprintDone label