feat: add reason to ServerMemberLeave event

closes #314

Signed-off-by: IAmTomahawkx <iamtomahawkx@gmail.com>

crates/core/database/src/models/server_members/model.rs

@@ -229,6 +229,7 @@ impl Member {
         EventV1::ServerMemberLeave {
             id: self.id.server.to_string(),
             user: self.id.user.to_string(),
+            reason: intention.clone().into(),
         }
         .p(self.id.server.to_string())
         .await;