cli: init rust test

[aoikurokawa]

Problem

close #2680

Summary of Changes

• Add an option rust-template in anchor init -t command.
• Add rust test templates.

I am submitting this pull request for review. As I am not entirely confident about my implementation, I would greatly appreciate any advice or suggestions. I am open to feedback and happy to make any necessary adjustments.

[vercel]

@aoikurokawa is attempting to deploy a commit to the coral-xyz Team on Vercel.

A member of the Team first needs to authorize it.

[acheroncrypto]

Thank you for starting on this!

I am submitting this pull request for review. As I am not entirely confident about my implementation, I would greatly appreciate any advice or suggestions. I am open to feedback and happy to make any necessary adjustments.

Can we add this as a template instead of a separate flag? It would also be much easier to add it that way since you can just specify all the necessary files in one place similar to

anchor/cli/src/rust_template.rs

Line 69 in 94fde24

fn create_program_template_multiple(name: &str, program_path: &Path) -> Files {

[aoikurokawa]

Thank you for the review.
Following your advice, I've added a new option to the --template rust-test.
I welcome any further advice or suggestions you might have.

[acheroncrypto]

Awesome work, thanks! A few more things and it should be good to merge.

[aoikurokawa]

@acheroncrypto
Thank you for reviewing. I relocated the code associated with testing to pub fn create_test_files function.

[acheroncrypto]

Thank you!