implement php 8.4 http_get_last_response_headers and http_clear_last_response_headers

[vapebw]

Implemented PHP 8.4 http_get_last_response_headers() and http_clear_last_response_headers().

Changes

• src/runtime/vm.zig: Added last_http_response_headers: ?*PhpArray = null to VM struct and reset it in VM.reset().
• src/stdlib/http.zig: Implemented http_get_last_response_headers() and http_clear_last_response_headers() in entries.
• src/stdlib/native_params.zig: Registered 0-arg parameter signatures for named arguments.
• src/stdlib/filesystem.zig: Added CURLOPT_HEADERFUNCTION in fetchUrl() to capture response headers into last_http_response_headers on HTTP requests, and reset state on request entry.
• tests/php84_http_response_headers.php: Added regression tests for function existence, return types, repeated clears, and reflection metadata.

[coderabbitai]

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[TrixNEW]

Thanks for the PR @vapebw. It looks good but you need to add actual HTTP regression tests. We should verify headers after file_get_contents() as well as redirects, HTTP error responses, failed requests, and clearing after a real request. The current tests, for the most part, verify registration/state and don't actually test the main behavior being implemented.

[vapebw]

Thanks for the PR @vapebw. It looks good but you need to add actual HTTP regression tests. We should verify headers after file_get_contents() as well as redirects, HTTP error responses, failed requests, and clearing after a real request. The current tests, for the most part, verify registration/state and don't actually test the main behavior being implemented.

I think its done now, regression tests are working i will appreciate review :)