refactor: use new style modules, flatten tests (#149) #720

Job	Run time
Check formatting	11s
Lint and smoke-test fuzz targets	1m 35s
Lint test-util	20s
Lint and test anodized-logic	26s
Lint and test anodized-fmt	33s
Lint and test anodized-core	22s
Lint and test anodized with cfg `--config 'build.rustflags=["--cfg","anodized_print"]'`	41s
Lint and test anodized with cfg `--config 'build.rustflags=["--cfg","anodized_panic"]'`	33s
Lint and test anodized with cfg `--config 'build.rustflags=["--cfg","anodized_discard_specs"]'`	36s
Lint and test anodized with cfg ``	33s
	5m 50s

Provide feedback