task(libs/account): Port app errors to libs/accounts/errors

[dschom]

Because

• We will need this for subsequent efforts

This pull request

• Ports oauth/errors.js and errors.js from auth-server to libs

Issue that this pull request solves

Closes: FXA-12581

Checklist

Put an x in the boxes that apply

• My commit is GPG signed.
• If applicable, I have modified or added tests which pass locally.
• I have added necessary documentation (if appropriate).
• I have verified that my changes render correctly in RTL (if appropriate).

Screenshots (Optional)

Please attach the screenshots of the changes made in case of change in user interface.

Other information (Optional)

This is a requirement for porting email sending code. Other PRs are based on this one.

[vbudhram]

@dschom Was this ticket just for moving the code? Or were you planning on updating the calling code too?

[dschom]

@vbudhram It's just moving it. I didn't want this PR to block the email sending PRs that are based on this one. Updating auth-server (and settings) is filed as a separate ticket, FXA-12585.

[vpomerleau]

Is there a follow-up issue to port/add tests such as packages/fxa-auth-server/test/local/error.js into this lib?

[dschom]

@vpomerleau I should do that here. I think I missed that file and it's a small lift. Thanks for flagging.