Add auto kick functionality (#502)

- Add command to configure the auto kick function
- Added ability to run functions on a cron job
- Added a cron job every hour to check if a user has had a role for a configured amount of time and kick them if they have
    - The function also optionally sends a notice embed at a configured time before the kick

#485

Reviewed-on: #502
Reviewed-by: VylpesTester <tester@vylpes.com>
Co-authored-by: Ethan Lane <ethan@vylpes.com>
Co-committed-by: Ethan Lane <ethan@vylpes.com>

src/constants/EmbedColours.ts

@@ -1,3 +1,5 @@
 export default class EmbedColours {
     public static readonly Ok = 0x3050ba;
+    public static readonly Warning = 0xffbf00;
+    public static readonly Danger = 0xd2042d;
 }