fix: relay Signals reset to plugins

[cablehead]

This PR will close #13501

Description

This PR expands on the relay of signals to running plugin processes. The Ctrlc relay has been generalized to SignalAction::Interrupt and when reset_signal is called on the main EngineState, a SignalAction::Reset is now relayed to running plugins.

User-Facing Changes

The signal handler closure now takes a signals::SignalAction, while previously it took no arguments. The handler will now be called on both interrupt and reset. The method to register a handler on the plugin side is now called register_signal_handler instead of register_ctrlc_handler example. This will only affect plugin authors who have started making use of #13181, which isn't currently part of an official release.

The change will also require all of user's plugins to be recompiled in order that they don't error when a signal is received on the PluginInterface.

Testing

: example ctrlc
interrupt status: false
waiting for interrupt signal...
^Cinterrupt status: true
peace.
Error:   × Operation interrupted
   ╭─[display_output hook:1:1]
 1 │ if (term size).columns >= 100 { table -e } else { table }
   · ─┬
   ·  ╰── This operation was interrupted
   ╰────

: example ctrlc
interrupt status: false   <-- NOTE status is false
waiting for interrupt signal...
^Cinterrupt status: true
peace.
Error:   × Operation interrupted
   ╭─[display_output hook:1:1]
 1 │ if (term size).columns >= 100 { table -e } else { table }
   · ─┬
   ·  ╰── This operation was interrupted
   ╰────

[IanManske]

Thanks for the PR! I think this looks good. I'll let @devyn confirm.

[devyn]

Makes sense to me.