Add machine pricing display feature

[matdevdug]

Related to #4

Implements the functionality to parse and display GCP machine type pricing information from a YAML file in a web application.

• Adds a command in the Dockerfile to download pricing.yml during the build process and store it in the container.
• Modifies main.py to:
  • Import the yaml module for parsing YAML files.
  • Add a new route /machine_pricing that handles GET requests, parses the pricing.yml file, and passes the data to a new template for rendering.
• Creates a new HTML template machine_pricing.html that:
  • Uses Bootstrap theming to format the pricing information as rows organized by machine type.
  • Dynamically generates a table displaying machine types, regions, and various pricing rates based on the parsed YAML data.

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For more details, open the Copilot Workspace session.