Add tests for new functionality

[egibs]

A lot of new functionality has been added recently and the testing gaps were piling up.

This PR covers a decent bit of the newly-added functionality by testing the following cases:

• Verifying that the correct extraction function is used based on file extension
• The functionality of the tar, gzip, and zip extraction functions
• Verifying that nested archive extraction produces the expected result
• Whether a scan of a nested archive works (in this case a .tar.gz with a .tar.gz file inside of it)
• The functionality of OCI image scanning

To support some of these test cases, I uploaded archives for each portion of the functionality and an output file with the expected scan results when testing the relevant case.

All of the new tests are passing locally and should in CI as well:

$ go test -timeout 30s -coverprofile=/var/folders/3g/88131l9j11x995ppjbxsvhbh0000gn/T/vscode-goHMiJhQ/go-code-cover github.com/chainguard-dev/bincapz/pkg/action

ok  	github.com/chainguard-dev/bincapz/pkg/action	6.489s	coverage: 57.9% of statements

This PR also adds a small test for the new profiling feature.

[tstromberg]

Can you change this to use the simple renderer? The output is more stable and lower maintenance for tests that don't require markdown specific testing.

[egibs]

Addressed in: 3b11939 (#215).