Since structured error data from clues is not added
to error message logging from assert and require,
we're slicing out data that is valuable to debugging.
This adds a package in tester which wraps the error
assertion funcs so that structured error data is
appended to all failure outputs.
* Fix wsl lint errors in pkg package
* Fix wsl lint errors in most of internal package
Leave some sub-packages out that have higher churn at the moment.
The alias of testing to ctesting prevented auto-importing
of the testing library. This change (arbitrarily) renames
the package so that it doesn't collide with the core pkg
for "testing".
