[Enhancement] Multiple CFT Ingest for Rulegen

[Relativity11]

Is your feature request related to a problem? Please describe.
Not yet but it could become a problem.

A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
Rules are generated by ONE template and may not become custom for multiple when there are 100's or 1000's of Cloudformation Templates.

Describe the solution you'd like
The ability for cfn-guard rulegen to generate rules from more than one or many CloudFormation Templates and provide a Rule "Blessing" for IaC to roll out.

A clear and concise description of what you want to happen.
e.g.,: cfn-guard rulegen -t file1.yaml file2.yaml file3.yaml -o IaCBless.rules
e.g.,: cfn-guard rulegen -folder -t ~/.CFT/* -o IaCBless.rules

Describe alternatives you've considered

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

Additional context
CFN-Guard would be an even greater tool for engineers if it learned from multiple CFT's what is ultimately allowed in an environment.

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