ISSUE-73 Add --force and --ignore-if-exists for init command

[hypnoglow]

Fixes #73

[codecov]

Codecov Report

Merging #207 (aef6f3b) into master (e2394cf) will decrease coverage by 2.96%.
The diff coverage is 8.33%.

@@            Coverage Diff             @@
##           master     #207      +/-   ##
==========================================
- Coverage   45.08%   42.11%   -2.97%     
==========================================
  Files          19       19              
  Lines         468      501      +33     
==========================================
  Hits          211      211              
- Misses        247      280      +33     
  Partials       10       10              

Impacted Files	Coverage Δ
internal/helmutil/repo_entry.go	50.00% <0.00%> (-50.00%)	⬇️
internal/helmutil/repo_entry_v2.go	57.57% <6.66%> (-42.43%)	⬇️
internal/helmutil/repo_entry_v3.go	53.33% <6.66%> (-46.67%)	⬇️
internal/helmutil/helm.go	50.00% <100.00%> (ø)

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[rounakdatta]

@hypnoglow this flag isn't yet present in the latest release yet, please plan a new release Thanks!