Chore: Documentation Overhaul, General Cleanup

[korenyoni]

What

• Port all documentation to be generated via terraform-plugin-docs
• Add https://allcontributors.org
• Add issue templates.
• Misc cleanups
• Update to go 1.18

Why

• Documentation is missing

Notes

PR Checklist

• I have allowed changes to my fork to be made.
• I have added tests, assuming new tests are warranted.
• I have updated the Terraform docs in this repo, assuming any changes to the schema of Resources or Data Sources have been made.
• I understand that the /test comment will be ignored by the CI trigger unless it is made by a repo admin or collaborator.

[korenyoni]

/test