implement game configuration file

this integrates https://github.com/cktan/tomlc99 into the repo as a dependency

third-party/tomlc99/stdex/arr2.toml.res

@@ -0,0 +1,11 @@
+{
+  integers2 = [
+    1,
+    2,
+    3,
+  ],
+  integers3 = [
+    1,
+    2,
+  ],
+}