Added support for custom user avatars

* Added support for custom user avatars

gaseous-server/Support/Database/MySQL/gaseous-1019.sql

@@ -0,0 +1,11 @@
+CREATE TABLE `UserAvatars` (
+  `UserId` VARCHAR(128) NOT NULL,
+  `Id` VARCHAR(45) NOT NULL,
+  `Avatar` LONGBLOB NULL,
+  PRIMARY KEY (`UserId`),
+  INDEX `idx_AvatarId` (`Id` ASC) VISIBLE,
+  CONSTRAINT `ApplicationUser_Avatar`
+    FOREIGN KEY (`UserId`)
+    REFERENCES `Users` (`Id`)
+    ON DELETE CASCADE
+    ON UPDATE NO ACTION);