Tracking issue for experimental "args" feature

This issue tracks the experimental "args" feature.

Enable semihosting::experimental::env::args.

Open issues

This has APIs somewhat different from those of the standard library.
The function has const generics that specify the size of the internal buffer.

semihosting/src/experimental/env.rs

Lines 12 to 13 in 1b82359

    
           /// Returns the arguments that this program was started with. 
        
           pub fn args<const BUF_SIZE: usize>() -> io::Result<Args<BUF_SIZE>> {

The iterator is implemented only for reference since it returns Result<&str>.

semihosting/src/experimental/env.rs

Lines 17 to 18 in 1b82359

    
           #[allow(clippy::copy_iterator)] // TODO 
        
           impl<'a, const BUF_SIZE: usize> Iterator for &'a Args<BUF_SIZE> {

TODO: write more on open issues

	/// Returns the arguments that this program was started with.
	pub fn args<const BUF_SIZE: usize>() -> io::Result<Args<BUF_SIZE>> {

	#[allow(clippy::copy_iterator)] // TODO
	impl<'a, const BUF_SIZE: usize> Iterator for &'a Args<BUF_SIZE> {