fix: crash on servers

- This makes overriding the screen less flexible, but out of all options, this was the best way to do it. Previously, the `@EnvType` annotation took care of keeping this out of the server code, but NeoForge decided to break perfectly functional behaviour once again, requiring me to remove the annotations 🫠

neoforge/build.gradle

@@ -39,6 +39,20 @@ loom {
             client()
             name = "Test Minecraft Client"
 
+            mods {
+                create('midnightlib') {
+                    sourceSet sourceSets.main
+                }
+                create('modid') {      // test mod
+                    sourceSet sourceSets.test
+                }
+            }
+            source sourceSets.test
+        }
+        testServer {
+            server()
+            name = "Test Minecraft Server"
+
             mods {
                 create('midnightlib') {
                     sourceSet sourceSets.main