feat: support string parameters in permits

[stonelgh]

To support string paramters and string literal arguments in permits definition

Related issue(s)

#1113

Checklist

• [x] I have read the contributing guidelines.
• [x] I have referenced an issue containing the design document if my change introduces a new feature.
• [x] I am following the contributing code guidelines.
• [x] I have read the security policy.
• [x] I confirm that this pull request does not address a security vulnerability. If this pull request addresses a security vulnerability, I confirm that I got the approval (please contact [email protected]) from the maintainers to push the changes.
• [x] I have added tests that prove my fix is effective or that my feature works.
• [ ] I have added or changed the documentation.

Further Comments

[CLAassistant]

All committers have signed the CLA.

[stonelgh]

Got that. Let me know if you need assistance.