implement game configuration file

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

third-party/tomlc99/stdex/tab09.toml.res

@@ -0,0 +1,10 @@
+{
+  fruit = {
+    apple = {
+      color = "red",
+      taste = {
+        sweet = true,
+      },
+    },
+  },
+}