Function execute 

pub fn execute(args: &NewArgs) -> Result<(), String>

Execute the new command

Creates a new Dampen project directory with:

• Cargo.toml with Dampen dependencies
• src/main.rs with a complete Hello World application using auto-loading
• src/ui/mod.rs - UI module
• src/ui/window.rs - UI model and handlers with #[dampen_ui] macro
• src/ui/window.dampen - Declarative UI definition (XML)
• tests/integration.rs - Integration tests
• README.md with comprehensive getting started instructions

Arguments

• args - Command arguments containing the project name

Returns

• Ok(()) - If project was created successfully
• Err(String) - If creation failed with error message

Errors

This function will return an error if:

• The project name is invalid
• A directory with the same name already exists
• File system operations fail (e.g., permission denied)