feat(generate): add CLI command generation and improve app structure handling

- Introduced a new subcommand for generating CLI commands within the `GeneratePlugin`, allowing users to create commands with specified flags and parent nesting.
- Enhanced the `generateApp` function to differentiate between CLI and web applications, adjusting directory structures and configuration file generation accordingly.
- Implemented caching for the latest Forge version to streamline dependency management in generated projects.
- Updated the `.forge.yaml` and `go.mod` generation to reflect the application type and version dynamically.

This update improves the usability of the Forge CLI for developers creating command-line applications.

Author: juicycleff