Register plug-in as Packer integration

[nywilken]

👋 fellow Packer maintainer working on migrating your plugin to the Packer integration framework.

This change takes the necessary steps to register this plugin as an official Packer integration.
Integrations can be found on the Packer integration portal at https://developer.hashicorp.com/packer/integrations.

---

The pull-request consists of the following changes:

• Adds controlling, metadata file, metadata.hcl for registering the plug-in and it components as integrations.
  Details on the contents, along with a description of the attributes, can be found at https://github.com/hashicorp/integration-template.
• Adds the GitHub action workflows for triggering manual and automatic integration updates.
• Restructures the plug-in documentation to match the expected format of the integration framework.
• Adds a .web-docs directory for serving the fully render documentation as the integration docs.
• Adds the build-docs make target make build-docs for syncing changes to the docs directory to the .web-docs directory.

Changes to the integration docs can be made at plugin release via the notify-integration-release-via-tag workflow or
manually by running the notify-integration-release-via-manual workflow.

Details on how the Integration framework pipeline works can be found at hashicorp/packer#12702

TODOs

• Open pull-request against external plugin.
• Update integration description .web-docs/metadata.hcl.
• Packer team open internal pull-request to enable integration.
• Review plugin integration on Packer integration portal .... Iterate

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[chris-rock]

@nywilken @BrandonRomano Thank you for the help to move it to the packer integration portal. Once @BrandonRomano agreed to the CLA, we can merge it and take care of the spelling issues.

[chris-rock]

@BrandonRomano is covered by the HashiCorp CLA. @benr can you help turn his CLA to green?

[nywilken]

@nywilken @BrandonRomano Thank you for the help to move it to the packer integration portal. Once @BrandonRomano agreed to the CLA, we can merge it and take care of the spelling issues.

Thank you @chris-rock. There are a few small updates that need to be made to complete the PR but please feel free to review the docs when you or the team have time. lbajolet-hashicorp will be assisting in getting this ready over the next couple of days.

[chris-rock]

recheck

[chris-rock]

Happy new year @nywilken @BrandonRomano. Is there anything missing from your side, otherwise we would love to get this merged.

[nywilken]

Hi @chris-rock thanks for bubbling this up. We are coming back from Holidays this week so catching up. Happy New Year. This PR is all good to go we enabled the integration on our end so you can merge and trigger the .github/workflows/notify-integration-release-via-manual.yaml job when ready with the existing plugin version.

[chris-rock]

Thank you @nywilken @lbajolet-hashicorp