Initial commit with a mostly working engine.

Basic commands are being parsed. I think the only weird part is the
'use' command because it needs to possibly target two things. A tiny
test example is provided in __main__, this will probably be broken out
later.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

Pipfile

@@ -0,0 +1,18 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+
+[dev-packages]
+black = "==21.9b0"
+mypy = "*"
+pylint = "*"
+pytest = "*"
+
+[requires]
+python_version = "3.9"
+
+[pipenv]
+allow_prereleases = true