ISSUE-300 Fix init command when repos file not exist

[hypnoglow]

Fixes #300

[codecov]

Codecov Report

Patch coverage: 16.66% and project coverage change: -0.59% ⚠️

Comparison is base (846ffb5) 42.11% compared to head (470a238) 41.53%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #301      +/-   ##
==========================================
- Coverage   42.11%   41.53%   -0.59%     
==========================================
  Files          19       19              
  Lines         501      508       +7     
==========================================
  Hits          211      211              
- Misses        280      287       +7     
  Partials       10       10              

Files Changed	Coverage Δ
internal/helmutil/helm_v2.go	20.00% <0.00%> (-10.77%)	⬇️
internal/helmutil/repo_entry.go	50.00% <ø> (ø)
internal/helmutil/repo_entry_v2.go	57.57% <50.00%> (ø)
internal/helmutil/repo_entry_v3.go	53.33% <50.00%> (ø)

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