ci: Add configuration files and workflows for enhanced CI/CD and quality checks

[Harmanpreet-Microsoft]

Purpose

The purpose of this PR is to:

• Enhance CI/CD Workflows:

Introduce parameterization and dynamic configuration to streamline deployment processes.
Automate Docker image builds and versioned deployments across environments.

• Improve Code Quality and Maintainability:

Enforce linting and test coverage standards using .flake8 and .coveragerc.
Introduce a standardized PR template for consistent reviews.

• Streamline Dependency Management:

Leverage Dependabot for automated updates, reducing manual effort and improving reliability.

• Increase Collaboration Efficiency:

Update CODEOWNERS to ensure comprehensive code reviews by including additional reviewers.

• Enable Flexible Deployment:

Replace hardcoded Docker image tags with the imageTag parameter for better version control and CI/CD integration.

• ...

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.