[Task] Introduce new script routing in apache/dubbo-spi-extensions

### Pre-check

- [X] I am sure that all the content I provide is in English.

### Search before asking

- [X] I had searched in the [issues](https://github.com/apache/dubbo/issues?q=is%3Aissue) and found no similar feature requirement.

### Apache Dubbo Component

Java SPI Extensions (apache/dubbo-spi-extensions)

### Descriptions

The script routing provided in the repo has been out of date for several releases. We can consider introducing a new script routing mechanism for more convenient and flexible traffic routing support.

For security considerations, we can move the implementation to apache/dubbo-spi-extensions.

### Related issues

#13548
https://github.com/apache/dubbo/discussions/13834

### Are you willing to submit a pull request to fix on your own?

- [ ] Yes I am willing to submit a pull request on my own!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)