feat: support direct rule evaluation with validator check --direct

[TylerGillson]

Issue

Resolves #102

Description

Adds --direct flag for validator check. In direct mode, no K8s cluster is required.

Instead, plugin rules are evaluated directly, in-process. Results are both saved to disk and printed to the console.

[codecov]

Codecov Report

Attention: Patch coverage is 41.89189% with 301 lines in your changes missing coverage. Please review.

Files	Patch %	Lines
pkg/services/validator/validator_service.go	29.16%	64 Missing and 21 partials ⚠️
pkg/services/validator/network.go	5.97%	61 Missing and 2 partials ⚠️
pkg/cmd/validator/validator.go	62.41%	44 Missing and 12 partials ⚠️
pkg/components/validator.go	50.84%	19 Missing and 10 partials ⚠️
cmd/validator.go	31.57%	8 Missing and 5 partials ⚠️
pkg/services/validator/oci.go	13.33%	12 Missing and 1 partial ⚠️
pkg/services/validator/vmware.go	47.05%	4 Missing and 5 partials ⚠️
pkg/utils/kube/kube.go	52.94%	4 Missing and 4 partials ⚠️
pkg/services/validator/aws.go	46.15%	3 Missing and 4 partials ⚠️
pkg/services/validator/azure.go	41.66%	3 Missing and 4 partials ⚠️
... and 4 more

@@            Coverage Diff             @@
##             main     #127      +/-   ##
==========================================
+ Coverage   36.86%   37.60%   +0.74%     
==========================================
  Files          44       44              
  Lines        5119     5435     +316     
==========================================
+ Hits         1887     2044     +157     
- Misses       2885     3005     +120     
- Partials      347      386      +39     

Files	Coverage Δ
pkg/config/config.go	66.03% <ø> (ø)
pkg/utils/cmd/cmd.go	33.33% <0.00%> (ø)
pkg/utils/exec/exec.go	44.06% <50.00%> (-6.68%)	⬇️
cmd/root.go	77.77% <0.00%> (+2.77%)	⬆️
...integration/_validator/testcases/test_validator.go	92.90% <78.26%> (-0.55%)	⬇️
pkg/services/validator/aws.go	14.39% <46.15%> (+0.24%)	⬆️
pkg/services/validator/azure.go	9.69% <41.66%> (+1.10%)	⬆️
pkg/utils/kube/kube.go	51.13% <52.94%> (-0.26%)	⬇️
pkg/services/validator/vmware.go	11.28% <47.05%> (+0.27%)	⬆️
cmd/validator.go	76.82% <31.57%> (-2.65%)	⬇️
... and 5 more

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