[Enhancement] Rulegen for non-cloudformation format

**Is your feature request related to a problem? Please describe.**
Would like to more easily create rules for non-cloudformation formats. Currently receive

```
Template lacks a Resources section
```

**Describe the solution you'd like**

Ability to run rulegen on terraform plan, k8s, etc.

**Describe alternatives you've considered**

A clear and concise description of any alternative solutions or features you've considered.

**Additional context**

Add any other context or screenshots about the feature request here.

No files or tests are named. Start by locating the rulegen command and the code producing “Template lacks a Resources section,” then review how Terraform plans and Kubernetes configurations are represented. Done means rulegen supports generating rules for the requested non-CloudFormation formats with coverage for those inputs.

Written by the indexing model from the issue text.