feat: add multi-engine regex flavour support

engines/php/NOTICE.PHP-public-domain-hash-code.txt

@@ -0,0 +1,45 @@
+PHP 8.5.8 bundled hashing notices
+=================================
+
+Source identity: php-src commit 26b97507444c4fbda072f57dda1820f7b7d5e467.
+The final PHP runtime exposes the corresponding MurmurHash3, SHA-3 and FNV
+algorithms. The exact source-file identities and upstream statements follow.
+
+ext/hash/murmur/PMurHash.c
+SHA-256: 1250fc4212bf980dfd97efb3dfae8fed0dac3bdcfec3f2605a1c19a65a0141ce
+
+MurmurHash3 was written by Austin Appleby, and is placed in the public
+domain.
+
+This implementation was written by Shane Day, and is also public domain.
+
+ext/hash/murmur/PMurHash128.c
+SHA-256: 09233b7dedf9c8d35da5ba3ffaa57f6e66fa89bb85b32cc9c69b3342d6c164cf
+
+MurmurHash3 was written by Austin Appleby, and is placed in the public
+domain.
+
+This is a c++ implementation of MurmurHash3_128 with support for progressive
+processing based on PMurHash implementation written by Shane Day.
+
+ext/hash/sha3/generic64lc/KeccakHash.c
+SHA-256: 78f55671fa3eb01d6bdc11a22e1c2a58b94340983186733ac0fbce39a6065220
+
+Implementation by the Keccak, Keyak and Ketje Teams, namely, Guido Bertoni,
+Joan Daemen, Michaël Peeters, Gilles Van Assche and Ronny Van Keer, hereby
+denoted as "the implementer".
+
+For more information, feedback or questions, please refer to our websites:
+http://keccak.noekeon.org/
+http://keyak.noekeon.org/
+http://ketje.noekeon.org/
+
+To the extent possible under law, the implementer has waived all copyright
+and related or neighboring rights to the source code in this file.
+http://creativecommons.org/publicdomain/zero/1.0/
+
+ext/hash/hash_fnv.c
+SHA-256: 7ed6c5a27cb567babb9202ed281f1c7446331f75e125bf11dc9d6f40f4a6266b
+
+Based on the public domain algorithm found at:
+http://www.isthe.com/chongo/tech/comp/fnv/index.html