implement game configuration file

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

third-party/tomlc99/stdex/arr1.toml.res

@@ -0,0 +1,56 @@
+{
+  integers = [
+    1,
+    2,
+    3,
+  ],
+  colors = [
+    "red",
+    "yellow",
+    "green",
+  ],
+  nested_arrays_of_ints = [
+    [
+      1,
+      2,
+    ],
+    [
+      3,
+      4,
+      5,
+    ],
+  ],
+  nested_mixed_array = [
+    [
+      1,
+      2,
+    ],
+    [
+      "a",
+      "b",
+      "c",
+    ],
+  ],
+  string_array = [
+    "all",
+    "strings",
+    "are the same",
+    "type",
+  ],
+  numbers = [
+    0.100000,
+    0.200000,
+    0.500000,
+    1,
+    2,
+    5,
+  ],
+  contributors = [
+    "Foo Bar <foo@example.com>",
+    {
+      name = "Baz Qux",
+      email = "bazqux@example.com",
+      url = "https://example.com/bazqux",
+    },
+  ],
+}