Add templating

[logan-connolly]

Todos

• Spec out python and golang solution templates
• Implement CLI for generating solution skeletons
• Update Makefile accordingly

In the end, I should be able to call something like this:

make skeleton lang=python year=2022 day=1
make skeleton lang=golang year=2022 day=1

And the following should be generated:

• All languages: solution directory (ie. ./2022/01/), input.txt
• Python: main.py
• Golang: main.go and main_test.go