feat(zpool): Fix parser for logs and caches. Add add_zil and add_cache

[andoriyu]

Fixes #62 and #61

[codecov]

Codecov Report

Merging #63 into master will decrease coverage by 0.79%.
The diff coverage is 72.09%.

@@            Coverage Diff            @@
##           master      #63     +/-   ##
=========================================
- Coverage   92.94%   92.14%   -0.8%     
=========================================
  Files           7        7             
  Lines        1233     1299     +66     
=========================================
+ Hits         1146     1197     +51     
- Misses         87      102     +15

Impacted Files	Coverage Δ
src/zpool/mod.rs	96.77% <100%> (+0.14%)	⬆️
src/zpool/open3.rs	83.56% <39.28%> (-1.32%)	⬇️
src/zpool/topology.rs	84.34% <80%> (-1.64%)	⬇️
src/zpool/description.rs	87.8% <84.21%> (-1.67%)	⬇️
src/parsers/mod.rs	96.29% <92.3%> (-0.43%)	⬇️

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