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, 7 insertions, 6 deletions

diff --git a/crates/shirabe/src/package/version/version_bumper.rs b/crates/shirabe/src/package/version/version_bumper.rs
index 6911fb14..50808916 100644
--- a/crates/shirabe/src/package/version/version_bumper.rs
+++ b/crates/shirabe/src/package/version/version_bumper.rs
@@ -5,8 +5,9 @@ use crate::package::dumper::ArrayDumper;
 use crate::package::loader::ArrayLoader;
 use crate::package::version::VersionParser;
 use crate::util::Platform;
-use shirabe_pcre::{CaptureKey, Preg};
-use shirabe_php_shim::php_regex;
+use shirabe_php_shim::{
+    CaptureKey, php_regex, preg_match_all_offset_capture, preg_match2, preg_replace,
+};
 use shirabe_semver::Intervals;
 use shirabe_semver::constraint::AnyConstraint;
 
@@ -45,12 +46,12 @@ impl VersionBumper {
             return Ok(pretty_constraint);
         }
 
-        let major = Preg::replace(php_regex!(r"{^([1-9][0-9]*|0\.\d+).*}"), "$1", &version);
+        let major = preg_replace(php_regex!(r"{^([1-9][0-9]*|0\.\d+).*}"), "$1", &version);
         let version_without_suffix =
-            Preg::replace(php_regex!(r"{(?:\.(?:0|9999999))+(-dev)?$}"), "", &version);
+            preg_replace(php_regex!(r"{(?:\.(?:0|9999999))+(-dev)?$}"), "", &version);
         let new_pretty_constraint = format!("^{}", version_without_suffix);
 
-        if !Preg::is_match(php_regex!(r"{^\^\d+(\.\d+)*$}"), &new_pretty_constraint) {
+        if preg_match2(php_regex!(r"{^\^\d+(\.\d+)*$}"), &new_pretty_constraint, 0).is_none() {
             return Ok(pretty_constraint);
         }
 
@@ -77,7 +78,7 @@ impl VersionBumper {
             major = major
         );
 
-        let matches = Preg::is_match_all_with_offsets3(&pattern, &pretty_constraint);
+        let matches = preg_match_all_offset_capture(&pattern, &pretty_constraint);
         if matches.occurrence_count() > 0 {
             let mut modified = pretty_constraint.clone();
             let constraint_matches = matches