feat: Remove archive-doc-gen folder, Refactor Azure Template Validation workflow and update README

[Kanchan-Microsoft]

Purpose

This pull request removes a significant amount of legacy and configuration files from the archive-doc-gen directory and updates the Azure template validation workflow. It also enhances the documentation in the README.md by adding new sections for features, getting started, guidance, and resources.

The most important changes are:

CI/CD and Workflow Updates:

• Replaces the old Azure template validation workflow in archive-doc-gen/.github/workflows/azure-dev.yml with an updated version at the repo root (.github/workflows/azure-dev.yml). The new workflow adds push triggers, sets the environment to production, includes an explicit Azure login step, and passes additional validation parameters and environment variables to the template validation action.

Repository Cleanup (archive-doc-gen):

• Removes various configuration and metadata files from archive-doc-gen, including devcontainer setup, flake8 config, git attributes, code owners, issue and pull request templates, Dependabot configuration, and a scheduled Dependabot auto-merge workflow. This reduces maintenance overhead and potential confusion from outdated files.

Documentation Improvements:

• Adds new sections to README.md for Features, Getting Started, Guidance, and Resources, making it easier for users to understand the project and how to begin using it.

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

Verify that the following are valid

• ...

Other Information