Created initial auth & project modules

[Fank]

This pull request introduces several significant changes, including the addition of configuration files for Dependabot, GitHub Actions workflows for Go linting, testing, and license checking, as well as new Go modules and utility functions for authentication and project ID retrieval.

Configuration and Automation:

• Dependabot Configuration: Added .github/dependabot.yml to automate dependency updates for Go modules and GitHub Actions.
• Go Lint and Test Workflows: Created .github/workflows/go.yml to set up workflows for linting and testing Go code using GitHub Actions.
• License Check Workflow: Added .github/workflows/license_go.yml to automate license checking and reporting for Go dependencies.

Go Modules and Dependencies:

• Go Module Initialization: Added go.mod file to define the module and its dependencies, including both direct and indirect dependencies.

Utility Functions:

• Authentication Utility: Implemented pkg/authentication/auth.go to handle OAuth2 token sourcing and HTTP authorization for Google Cloud services.
• Project ID Retrieval: Added pkg/project/project.go to fetch the Google Cloud project ID from the environment or metadata server.