feat(dns): add record import command for BIND and JSON files

[jremy42]

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Relates OR Closes #0000

Release note for CHANGELOG:

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 340 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.93%. Comparing base (8e9fb91) to head (7c08397).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...l/namespaces/domain/v2beta1/record_import_parse.go	0.00%	196 Missing ⚠️
.../namespaces/domain/v2beta1/custom_record_import.go	0.00%	143 Missing ⚠️
internal/namespaces/domain/v2beta1/custom.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5470      +/-   ##
==========================================
- Coverage   51.16%   50.93%   -0.23%     
==========================================
  Files         324      326       +2     
  Lines       75683    76023     +340     
==========================================
  Hits        38726    38726              
- Misses      35480    35820     +340     
  Partials     1477     1477              

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