Use the Events plugin infrastructure for Chat and Damage

[mtijanic]

Chat and Damage (and maybe other?) plugins implement their own ad-hoc version to register and signal events, and to pass data. They should either use the message bus to signal them via nwnx_events, or just move the functionality out of these plugins into the events directly.

Should leave a deprecation compat shim for a while

[mtijanic]

Also Weapon's devastating critical. I think Weapon and Damage can just be collapsed entirely into other plugins.

[mtijanic]

...and devastating critical from Weapon...