implement game configuration file

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

third-party/tomlc99/stdex/string4.toml.res

@@ -0,0 +1,6 @@
+{
+  str4 = "Here are two quotation marks: \"\". Simple enough.",
+  str5 = "Here are three quotation marks: \"\"\".",
+  str6 = "Here are fifteen quotation marks: \"\"\"\"\"\"\"\"\"\"\"\"\"\"\".",
+  str7 = "\"This,\" she said, \"is just a pointless statement.\"",
+}