feat: initiate mongo replset by default

Signed-off-by: Zomatree <me@zomatree.live>

crates/core/config/Revolt.test.toml

@@ -1,5 +1,5 @@
 [database]
-mongodb = "mongodb://localhost"
+mongodb = "mongodb://localhost?directConnection=true&replicaSet=rs0"
 redis = "redis://localhost/"
 
 [rabbit]

crates/core/config/Revolt.toml

@@ -4,7 +4,7 @@ disable_events_dont_use = false
 [database]
 # MongoDB connection URL
 # Defaults to the container name specified in self-hosted
-mongodb = "mongodb://database"
+mongodb = "mongodb://database?directConnection=true&replicaSet=rs0"
 # Redis connection URL
 # Defaults to the container name specified in self-hosted
 redis = "redis://redis/"