feat: Add MariaDB interfaces for User and Follow

This commit introduces definitions for UserInDatabase and FollowInDatabase interfaces. These interfaces will provide a strict typing for objects retrieved from MariaDB, ensuring consistency and decreasing potential runtime errors.

src/interfaces/db/mariadb.interface.ts

@@ -0,0 +1,21 @@
+export interface UserInDatabase {
+	id: string,
+	username: string,
+	display_name: string,
+	email: string,
+	iat?: number,
+	uat?: number,
+	deactivated?: ArrayBuffer,
+	hash: string,
+	email_activation?: number | null,
+	admin?: ArrayBuffer,
+	avatar_id?: string | null,
+	gdpr?: number
+}
+
+export interface FollowInDatabase {
+	id: string,
+	source_id: string,
+	target_id: string,
+	iat?: number
+}