cmd: add logs

[xenowits]

Adds --log-level flag and additional logs to add-validators-solo command.

category: feature
ticket: #1887

[xenowits]

With debug logs:

With info logs:

[codecov]

Codecov Report

Patch coverage: 60.60% and project coverage change: -0.26 ⚠️

Comparison is base (aba2bb5) 53.85% compared to head (e57d5c9) 53.59%.

❗ Current head e57d5c9 differs from pull request most recent head 5175689. Consider uploading reports for the commit 5175689 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2377      +/-   ##
==========================================
- Coverage   53.85%   53.59%   -0.26%     
==========================================
  Files         192      192              
  Lines       25961    25964       +3     
==========================================
- Hits        13980    13915      -65     
- Misses      10257    10323      +66     
- Partials     1724     1726       +2     

Impacted Files	Coverage Δ
cmd/addvalidators.go	52.94% <60.60%> (+1.29%)	⬆️

... and 16 files with indirect coverage changes

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