refactor(pcre): inline Preg into its call sites and drop the crate

Preg had shed everything it owned: after the last few rounds its methods
were one-line forwards to the shim's preg_*(), differing only in a
default argument or a wrapper the caller unwrapped anyway. The 460 call
sites now name the shim function, and shirabe-pcre is gone from the
workspace along with its LICENSE entry.

The forwards expand as they read: isMatch becomes
preg_match2(.., 0).is_some() (is_none() where PHP negates it), isMatch3
and match3 drop the .is_some(), matchAll counts through
preg_match_all2(..).occurrence_count(), and replace4/replace5 spell out
the limit and count arguments preg_replace2 takes. Callbacks are the one
place the shapes differ: preg_replace_callback carries an error out of
the callback, so the fourteen infallible closures wrap their result in
Ok() and expect() it back.

Config::process() is the fifteenth, and it drops the `error` cell it
captured to smuggle a failure past a closure that could only return a
String. The `?` in the closure now carries it, which is what the PHP
does -- a throw from the callback leaves preg_replace_callback at the
failing match rather than running the remaining replacements and
reporting the last error.

The module doc that explained why composer/pcre's exceptions and
*StrictGroups() variants have no counterpart moves to the shim's preg
module, where the functions it describes live.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/crates/shirabe/tests/common/io_mock.rs b/crates/shirabe/tests/common/io_mock.rs
index c1bd5e00..7aaa231a 100644
--- a/crates/shirabe/tests/common/io_mock.rs
+++ b/crates/shirabe/tests/common/io_mock.rs
@@ -5,8 +5,7 @@ use shirabe::io::buffer_io::BufferIO;
 use shirabe::io::io_interface;
 use shirabe::io::{IOInterface, IOInterfaceImmutable, IOInterfaceMutable};
 use shirabe::util::platform::Platform;
-use shirabe_pcre::Preg;
-use shirabe_php_shim::{PHP_EOL, PhpMixed, php_regex, preg_quote, preg_split};
+use shirabe_php_shim::{PHP_EOL, PhpMixed, php_regex, preg_match2, preg_quote, preg_split};
 use shirabe_symfony_console::output::output_interface;
 use std::collections::VecDeque;
 
@@ -167,7 +166,7 @@ impl IOMock {
                 };
 
                 while let Some(line) = lines.pop_front() {
-                    if Preg::is_match(&pattern, &line) {
+                    if preg_match2(&pattern, &line, 0).is_some() {
                         continue 'expects;
                     }