feat: Resend Code Verification Time

[warcooft]

Description

This pull request provides a delay time for each verification code sent to the user's email to avoid spam when the user continuously refreshes the page, improving performance and a comfortable experience for the user.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[kenjis]

Please fix errors in GitHub Action checks, and add test code.
Reference: https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/pull_request.md

[kenjis]

Important

We expect all code changes or bug-fixes to be accompanied by one or more tests
added to our test suite to prove the code works.

This PR does not have the necessary test code. If you want this PR to be reviewed, please add the test code.
See https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/pull_request.md#unit-testing

If the test is not added, this PR will be closed.