Add validation schemas and improve texture handling

Introduces zod-based validation schemas for Minecraft and Mojang API endpoints. Refactors texture route to support hash-based file serving and removes the old static texture route. Updates database schema for player properties and adds an event to clean expired certificates. Improves ValidationError formatting, adjusts skin/cape URL construction, and adds SSRF protection for skin uploads.

schemas/mojangapi/profile/lookup/name/[username].js

@@ -0,0 +1,13 @@
+const z = require("zod")
+
+module.exports = {
+    GET: {
+        params: z.object({
+            username: z.string().min(1, { message: "Username is required." })
+        }),
+        error: {
+            code: 404,
+            message: "Not Found"
+        }
+    }
+}