docs: common integrations / tools to install in container

[nitrocode]

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• I'd be willing to implement this feature (contributing guide)

Describe the user story

It's difficult for new users to know how to use additional tools that are not provided by the docker container image

Describe the solution you'd like

We document cdktf and terragrunt. I'd like to also document other tools for different

install methods

• debian
• alpine
• workflow on-the-fly installs

For each tool

• tf-summarize
• inframap
• cost
  • infracost
    • already well documented on their website
    • a link back to the document with any additional configs that aren't on their website
  • terracost
• terraform wrappers
  • atmos
  • terragrunt (partial)
  • cdktf (partial)
  • terramate
• sast/dast
  • checkov
  • regula
  • terrascan
  • tflint
  • tfsec
• more?

Show

• tool use cases
• install in container
• verify gpg signature
• workflow customization
• add tool specific config file

Pipeline to build container

• github action
• jenkins
• more?

I imagine we could either

• keep expanding the customize page
• create a single page per customization tool

Describe the drawbacks of your solution

More docs to maintain

Describe alternatives you've considered

None