Implement TryFromIntError conversion for AnchorError

[CanardMandarin]

I noticed it was a bit painful to cast integers with try_into and try_from because you have to either unwrap() or map_err(||).

What about implementing TryFromIntError for Error so we can use the ? operator?

[vercel]

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

A member of the Team first needs to authorize it.

[acheroncrypto]

Thanks, I think this would be great to have.

Before we merge, could you add a test case for this here?

[CanardMandarin]

Sure! I have added a test case.

[acheroncrypto]

Please also add the new error variant in TS package:

• https://github.com/coral-xyz/anchor/blob/14309ea14639b8042055e1b432bd6be24434970f/ts/packages/anchor/src/error.ts#L308
• https://github.com/coral-xyz/anchor/blob/14309ea14639b8042055e1b432bd6be24434970f/ts/packages/anchor/src/error.ts#L402

[CanardMandarin]

My bad, I should have thought about it!

[acheroncrypto]

Thanks but CI has a formatting error now. Please run yarn lint:fix.

Also, it might be good to include this feature in the CHANGELOG, otherwise it would be hard to discover.

[CanardMandarin]

Feel free to modify the changelog entry if the description is not clear.

[acheroncrypto]

Thanks!