Support 'inline-speculation-rules' keyword

Problem/Motivation

Chrome 110 introduced a new keyword, 'inline-speculation-rules', for use on script-src (and script-src-elem?)

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Securi...
https://chromestatus.com/feature/5182859125456896

Proposed resolution

- Add Csp class constant for new keyword
- Add option to configuration form?

Remaining tasks

User interface changes

API changes

Data model changes