chore: add dupword CI && remove repetitive words globally

[goofylfg]

Description

use https://github.com/Abirdcfly/dupword to check duplicate words && check it manually to avoid false positve.

PR checklist

• [ ] Tests written/updated
• [ ] Changelog entry added in .changelog (we use unclog to manage our changelog)
• [ ] Updated relevant documentation (docs/ or spec/) and code comments