First full release of Simvue client

• Refactor and re-write of codebase to align with latest developments in version 2 of the Simvue server.
• Added Executor to Simvue runs allowing users to start shell based processes as part of a run and handle termination of these.
• Removal of obsolete functions due to server change, and renaming of functions and parameters (see documentation).
• Added pre-request validation to both Client and Run class methods via Pydantic.
• Separation of save functionality into save_file and save_object.
• Fixed issue whereby metrics would still have to wait for the next iteration of dispatch before being sent to the server, even if the queue was not full.
• Added support for 'user' alerts.