[chore] clippy warnings

[icepuma]

• use https://crates.io/crates/pretty-assertions
  • gets rid of "bool_assert_comparison" clippy warnings
  • add prettier assertions
• enhanced "check.sh" to also cover tests for clippy warnings

Not using the PR template, as this is a cleanup

[codecov-commenter]

Codecov Report

Merging #230 (417fdb5) into main (24183f6) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #230      +/-   ##
==========================================
- Coverage   46.10%   46.07%   -0.03%     
==========================================
  Files          69       69              
  Lines        2180     2179       -1     
==========================================
- Hits         1005     1004       -1     
  Misses       1175     1175              

Impacted Files	Coverage Δ
lib/src/actions/package/providers/dnf.rs	58.02% <ø> (-0.52%)	⬇️
lib/src/actions/user/providers/mod.rs	0.00% <0.00%> (ø)
lib/src/atoms/command/exec.rs	48.48% <ø> (ø)
lib/src/atoms/directory/create.rs	82.60% <ø> (ø)
lib/src/atoms/file/chmod.rs	73.07% <ø> (ø)
lib/src/atoms/file/chown.rs	64.15% <ø> (ø)
lib/src/atoms/file/contents.rs	67.85% <ø> (ø)
lib/src/atoms/file/copy.rs	78.04% <ø> (ø)
lib/src/atoms/file/create.rs	75.00% <ø> (ø)
lib/src/atoms/file/decrypt.rs	87.09% <ø> (ø)
... and 9 more

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