review Project entrypoint in webserver

[sanderegg]

Currently the frontend uses the following endpoints:

• POST /projects -> creates a new project (updates DB)
• PUT /projects/{puuid} --> replaces the current project (updates DB) - is called a lot from frontend
• POST /projects/{puuid}/nodes --> create a new node BUT does not update the DB
• DELETE /projects/{puuid}/nodes --> deletes node (stops dynamic service) BUT does not update DB

All this needs a review and should at least be modified like so (all should modify the DB):

• POST /projects -> creates a new project, returns among other the project UUID
• PUT /projects/{puuid} --> replaces the current project , its use should be reduced
• PATCH /projects/{puuid} --> updates the project (for sharing rights, TSR, etc, project related stuff mostly)
• POST /projects/{puuid}/nodes --> create a new node (pass key,version, params if frontend node)
  (- GET /projects/{puuid}/nodes --> get all the nodes in the project)
• GET /projects/{puuid}/nodes/{nuuid} --> get a node
  (- PUT /projects/{puuid}/nodes/{nuuid} --> replaces node)
• PATCH /projects/{puuid}/nodes/{nuuid} --> modify a node (for example position, parameters, etc...)
• DELETE /projects/{puuid}/nodes/{nuuid} --> deletes node (stops dynamic service, stops computation if running and forced)

[sanderegg]

• related to Review webserver API #1976