feat: add static code checks on commit

[bzarboni1]

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ISSUE

37 - Add Git Commit hooks to enforce conventional commits

Following #36 , we decided to enforce Conventional Commits. As such, we will require:

• pre-commit git checks
• a CONTRIBUTING.md file on how contributions should be made

CHANGES

This PR includes the following changes:

• Added a CONTRIBUTING.md guide, detailing how to get setup to develop in the repo
• added a script that will run to setup some of the developer environment
• added pre-commit to run commit-time checks. This replaces some of the GitHub Hooks we had previously
• added the following pre-commit checks:
  • commitizen: to enforce Conventional Commits
  • trailing-whitespace
  • end-of-file-fixer
  • check-added-large-files
  • detect-private-key
  • terraform_fmt
  • terragrunt_fmt
  • terraform_tflint
  • terraform_validate
  • terraform_trivy: Static analysis of security settings in your Terraform code, using Trivy

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