Support AST extension

[Halleck45]

Hi,

Thank you for this tool; it's a really great idea!

This PR adds support for the ast extension (at least on Linux).

1. I wasn't able to test the build on Mac. Could a Mac owner test it? (./bin/spc build --build-cli ast)
2. Is there anything to do to update the list of supported extensions on the documentation website?

Thanks!

Checklist before merging

If your PR involves the changes mentioned below and completed the action, please tick the corresponding option.
If a modification is not involved, please skip it directly.

• If it's an extension or dependency update, make sure adding related extensions in src/global/test-extensions.php.
• If you changed the behavior of static-php-cli, update docs in ./docs/.
• If you updated config/xxx.json content, run bin/spc dev:sort-config xxx.

[crazywhalecc]

Thanks for your contribution! The ast extension seems to be possible now. I will modify it to support it directly if you don't mind.

There are tests for MacOS and Linux, which can be tested by modifying the variables at the top of the src/globals/test-extensions.php file.