implement game configuration file

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

third-party/tomlc99/stdex/keys05.toml

@@ -0,0 +1,3 @@
+fruit.name = "banana"     # this is best practice
+fruit. color = "yellow"    # same as fruit.color
+fruit . flavor = "banana"   # same as fruit.flavor