Add new table to record bot presences.

database_setup/database.sql

@@ -33,4 +33,9 @@ CREATE TABLE UserBirthday (
     UserId bigint unsigned not null,
     Birthday varchar(5) not null,
     PRIMARY KEY (UserId)
+);
+
+CREATE TABLE Presences (
+    Id integer PRIMARY KEY,
+    Presence varchar(100) not null
 );