Initial commit: Star of Words Unity project

Snapshot of the existing Unity 6 language-learning word game before any
refactoring. Adds Unity .gitignore and .gitattributes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/GoogleMobileAds/Editor/Utils.cs.meta

@@ -0,0 +1,17 @@
+fileFormatVersion: 2
+guid: 7d7678b2375fe4456b0ab2b506c2240c
+labels:
+- gvh
+- gvh_version-11.2.0
+- gvhp_exportpath-GoogleMobileAds/Editor/Utils.cs
+timeCreated: 1480838400
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon:
+    instanceID: 0
+  userData:
+  assetBundleName:
+  assetBundleVariant: