Adds websocket vendor requests to start and stop the plugin.
Adds vendor events to indicate when the plugin is started or stopped.
These are ntended to be used for the StreamDeck plugin support.
Using a submodule which is not available as a package on Debian makes it
difficult to package the plugin for Debian.
Instead add the obs-websocket header file directly to the repo.
Using a submodule which is not available as a package on Debian makes it
difficult to package the plugin for Debian.
Instead add the obs-websocket header file directly to the repo.
