Does not ensure addon is built before running tests

[RobbieTheWagner]

Per my discussion with @NullVoxPopuli we are relying on prepare to build the addon, but you might not have that script setup. It could be nice to tie the build into the test scripts.

[NullVoxPopuli]

Thanks for reporting! this is def an area we can and should improve on!

tho, prepare will only run after install, so it wouldn't be good DX for post-install workflows.

I think we probably need to set up https://turbo.build/repo or https://github.com/google/wireit some similar tool