feat: introduce logging and errors packages

[phisco]

Description of your changes

Fixes #22.

I proxied the logging package to it's crossplane-runtime counterpart, I felt it was ok to do so because of the small interface the original package has, while I directly vendored errors, as it felt already mainly a proxy to the stdlib errors package and didn't want to add one more indirection layer.

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable to ensure this PR is ready for review.

How has this code been tested

[negz]

Awesome, thank you!