Initial commit: Welcome Screen mod v1.1.0

- Welcome screen GUI dialog on player join
- Markdown to VTML converter
- Mod checker (recommended/blacklisted mods)
- HOME key to reopen
- CI/CD pipeline for build + release

resources/modinfo.json

@@ -0,0 +1,11 @@
+{
+    "type": "code",
+    "modid": "welcomescreen",
+    "name": "Welcome Screen",
+    "version": "1.1.0",
+    "description": "Shows a welcome screen with server rules and info when players join. Includes mod checker that compares client mods against recommended/blacklisted mods. Content loaded from Markdown, rendered as VTML. Press HOME to reopen.",
+    "authors": ["Calic"],
+    "side": "universal",
+    "requiredOnClient": true,
+    "requiredOnServer": true
+}