feat: support multile components in one OCI repo

[Abirdcfly]

What type of PR is this?

/kind feature

What this PR does / why we need it

we can support follow oci url after this pr merged:

• harbor:
  • oci://demo.goharbor.io/helm-test
  • oci://demo.goharbor.io/helm-test/nginx
• dockerhub
  • oci://registry-1.docker.io/bitnamicharts
  • oci://registry-1.docker.io/bitnamicharts/wordpress
• github package for organization:
  • oci://ghcr.io/oci-helm-example
  • oci://ghcr.io/oci-helm-example/redis
  • oci://ghcr.io/oci-helm-example/helm-oci-example
  • oci://ghcr.io/oci-helm-example/helm-oci-example/nginx
• github package for user:
  • oci://ghcr.io/abirdcfly
  • oci://ghcr.io/abirdcfly/redis
  • oci://ghcr.io/abirdcfly/helm-oci-example
  • oci://ghcr.io/abirdcfly/helm-oci-example/nginx

Which issue(s) this PR fixes

Fixes #298

Special notes for your reviewer

xref: kubebb/website#60

[codecov]

Codecov Report

Merging #316 (d2a79a3) into main (a046a7a) will increase coverage by 1.90%.
The diff coverage is 45.03%.

@@            Coverage Diff             @@
##             main     #316      +/-   ##
==========================================
+ Coverage   22.51%   24.42%   +1.90%     
==========================================
  Files          36       37       +1     
  Lines        3264     3529     +265     
==========================================
+ Hits          735      862     +127     
- Misses       2491     2609     +118     
- Partials       38       58      +20     

Files Changed	Coverage Δ
api/v1alpha1/component.go	100.00% <ø> (ø)
controllers/componentplan_controller.go	5.43% <0.00%> (-0.10%)	⬇️
pkg/helm/cmd.go	0.00% <0.00%> (ø)
pkg/helm/helm.go	7.05% <0.00%> (+0.18%)	⬆️
pkg/helm/oci_list.go	48.63% <48.63%> (ø)
api/v1alpha1/repository.go	14.28% <100.00%> (+1.66%)	⬆️

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[Abirdcfly]

@bjwswang PTAL