Add comparison of tools capabilities independently of test cases

[christophetd]

Usage example:

$ python capabilities/main.py

Current output:

Overview

	License	Maintainer	Website	Requires registration?
Regula	OSS (Apache-2.0)	Fugue	regula.dev	No
Cloudrail	Freemium	Indeni	www.indeni.com/cloudrail	Yes
Checkov	OSS (Apache-2.0)	Bridgecrew	checkov.io	No

IaC language support

	Terraform HCL	Terraform plan	CloudFormation	Pulumi
Regula	:white_check_mark:	:white_check_mark:	:white_check_mark:	:x:
Cloudrail	:x:	:white_check_mark:	:white_check_mark:	:x:
Checkov	:white_check_mark:	:white_check_mark:	:white_check_mark:	:x:

Cloud provider support

	AWS	Azure	GCP
Regula	:white_check_mark:	:white_check_mark:	:white_check_mark:
Cloudrail	:white_check_mark:	:x:	:x:
Checkov	:white_check_mark:	:white_check_mark:	:white_check_mark:

Custom rules

	Language	Multi-resource correlation	Correlation with runtime resources	Out-of-the-box support for unit tests
Regula	rego	:white_check_mark:	:x:	:white_check_mark:
Cloudrail	N/A (unsupported)	:x:	:x:	:x:
Checkov	python or YAML	:white_check_mark:	:x:	:x:

Scan output

	Supported output formats	Shows offending file names	Shows offending line numbers
Regula	json, junit, tap, human-readable	:x:	:white_check_mark:
Cloudrail	junit-xml, gitlab-sast, sarif, human-readable	:x:	:x:
Checkov	todo	:white_check_mark:	:white_check_mark: