Added base changes for database migration command (unfinished)

lang/en.yml

@@ -26,6 +26,7 @@ DATABASE_UNREACHABLE: "Database is unreachable. Discarding data and shutting dow
 DEVELOPMENT_BRANCH: "Development branch detected, skipping patch scripts."
 DIRT_BLOCK: "Placed a temporary safety block under you."
 DISABLE_SUCCESS: "Success! Disabled {0}"
+DONATION_KEY_REQUIRED: "A valid donation key is required for that command."
 ENABLE_FAILED: "{0} was unable to start."
 ENABLE_SUCCESS: "{0} has been successfully enabled!"
 ENJOY_COREPROTECT: "Enjoy {0}? Join our Discord!"
@@ -202,6 +203,7 @@ USER_OFFLINE: "The user \"{0}\" is not online."
 USING_MYSQL: "Using MySQL for data storage."
 USING_SQLITE: "Using SQLite for data storage."
 VALID_DONATION_KEY: "Valid donation key."
+VERSION_INCOMPATIBLE: "{0} {1} is not supported."
 VERSION_NOTICE: "Version {0} is now available."
 VERSION_REQUIRED: "{0} {1} or higher is required."
 WORLD_NOT_FOUND: "World \"{0}\" not found."