feat(events): add message update, role, and voice state update handlers

- Implemented `handle_message_update` to log message edits.
- Created role event handlers for role creation, update, and deletion.
- Added voice state update handling to log channel changes.
- Introduced a new `ready_event` handler to restore bot presence and enforce blacklist.
- Updated `mod.rs` to include new event modules.
- Enhanced `main.rs` for database connection and initialization.
- Added comprehensive permission management in `permissions.rs`.

src/events/mod.rs

@@ -0,0 +1,11 @@
+pub mod channel_event;
+pub mod guild_create_event;
+pub mod guild_member_event;
+pub mod handler;
+pub mod interaction_create_event;
+pub mod message_delete_event;
+pub mod message_event;
+pub mod message_update_event;
+pub mod ready_event;
+pub mod role_event;
+pub mod voice_state_update_event;