feat(phpt): add PHP .phpt filter for php-src run-tests.php

Wraps `php run-tests.php` and collapses its per-test PASS chatter into
one summary line plus a bounded list of failure diffs. On php-src's
5322-test suite with 467 failures, output drops from 1.3 MB to 6 KB
(99.5% reduction). An all-pass run collapses to two lines.

Handles PASS/FAIL/SKIP/BORK/WARN/LEAK/XFAIL, ANSI color codes, the
========DIFF======== / ========DONE======== blocks, and the trailing
FAILED TEST SUMMARY block (which must not be re-counted).

Author: iliaal

README.md

@@ -175,6 +175,7 @@ rtk jest                        # Jest compact (failures only)
 rtk vitest                      # Vitest compact (failures only)
 rtk playwright test             # E2E results (failures only)
 rtk pytest                      # Python tests (-90%)
+rtk phpt                        # PHP .phpt tests (run-tests.php, -99%)
 rtk go test                     # Go tests (NDJSON, -90%)
 rtk cargo test                  # Cargo tests (-90%)
 rtk rake test                   # Ruby minitest (-90%)

src/cmds/mod.rs

@@ -5,6 +5,7 @@ pub mod dotnet;
 pub mod git;
 pub mod go;
 pub mod js;
+pub mod php;
 pub mod python;
 pub mod ruby;
 pub mod rust;

src/cmds/php/mod.rs

@@ -0,0 +1 @@
+automod::dir!(pub "src/cmds/php");