docs: Add api documentation

docs: Add scaffolding from sc-template

Correct docs, release 0.2.0

Tests for posargs

Lots more test improvement

Test and fix bugs in --arg=value args

Add test for string arguments

Properly parse integers and fail on malformed ones

Enable error printing for debugging

Fix off-by-one in example.c

Release 0.1.0 as we haven't had a version yet

Add simple unit tests

Run pre-commit on all files

Add return to main()

Add README

Add typical sc- project files and build system

Fix some warnings and document header

Initial commit of working argparse