Make voice call out other notification and events

[alexemanuelol]

Such as:

• Teammate connect/disconnect/join team/leave team/died.
• Tracker connect/disconnect.
• Make bot say stuff by using a !say command in-game.
• Server went online/offline/wiped.
• Smart alarm notifications
• Smart devices no longer detected?

[FaiThiX]

working on it, smart devices are a bit tricky...
https://github.com/FaiThiX/rustplusplus/tree/voice_extras