ScriptEngine: added FileSystemWatcher, optionally including subdirectories and…

[Theadd]

The entries added to the com.bepis.bepinex.scriptengine.cfg file can be used as this PR's description:

## Suppress sending log messages to console except for the error ones.
# Setting type: Boolean
# Default value: false
QuietMode = true

## Listens for changes to the scripts directory and reloads all plugins automatically.
# Setting type: Boolean
# Default value: false
EnableFileSystemWatcher = true

## Include also subdirectories under the scripts folder.
# Setting type: Boolean
# Default value: false
IncludeSubdirectories = true

[ghorsington]

Thank you for your PR!

This looks otherwise fine to me sans one note. Please check it out before I can merge this.

[DemoJameson]

I think this pr is ready to merge

[ManlyMarco]

Sorry for the delay, the PR looks good. Thank you!