Notifications

[ouwou]

closes #94

this introduces desktop notifications. currently only on mac/linux/whatever supports org.freedesktop.Notifications

miniaudio will also be an optional dependency for notification sounds (which im using as opposed to something like libcanberra because ill be using miniaudio anyways in the voice implementation)

some things remaining:

• general settings for notifications including option to turn them off altogether
• cleaning up markup because notification servers like to parse them
• notification withdraw
• configure channel notification settings from within the client itself (might not do this)
• handle potential weird edge cases (i.e. end_time)
• handle role mentions properly
• check if im doing action target values properly
• other stuff that i am forgetting