add xtask to aya-template

[endepointe]

Hey rustaceans. I went through the setup, using the aya-template and I am curious why the xtask is not part of the template? Also, why is cargo-xtask not referenced in the tutorials https://aya-rs.dev/book/start/ ? There are a few crates that reference xtask* so it was rather confusing at first to know what xtask package was being referred to in the xdp-hello example.

This issue is a nice-to-have or documentation label.

Thanks for the future feedback!

[endepointe]

User-defined aliases will become errors in the future if using cargo-xtask so how will aya minimize this issue?

cargo xtask run -- -h                                                                                                                                                                            
warning: user-defined alias `xtask` is shadowing an external subcommand found at: `/home/ende/.cargo/bin/cargo-xtask`                                                                                                                         
This was previously accepted but is being phased out; it will become a hard error in a future release.                                                                                                                                        
For more information, see issue #10049 <https://github.com/rust-lang/cargo/issues/10049>.     

[tamird]

We are moving away from xtask. See aya-rs/aya-template#124 and aya-rs/aya-template#132.

The book examples still refer to xtask because we haven't updated those programs, which is what we should actually do.

[tamird]

Closing as duplicate of #176.