php
Add missing ext/operator documentation
This pull request is to add the missing documentation for the PECL operator extension. I have taken over as the lead maintainer for that extension, but this is my first contribution to the PHP documentation so any feedback is welcome. There is a companion pull request to doc-base that goes with one and is required by this one. https://github.com/php/doc-base/pull/246
There appears to never have been any documentation for the PECL operator extension. For this pull request I've added the test class that ext/operator uses all of its overloading capabilities as a complete code sample.
I would like to note that since this is a new documentation the workflow run https://github.com/php/doc-en/actions/runs/14958493251/job/42050000015 is going to fail until the related pull request https://github.com/php/doc-base/pull/246 is merged.
