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, 3 insertions, 4 deletions

diff --git a/crates/shirabe/src/util/perforce.rs b/crates/shirabe/src/util/perforce.rs
index c0cd5a08..32e3e9cd 100644
--- a/crates/shirabe/src/util/perforce.rs
+++ b/crates/shirabe/src/util/perforce.rs
@@ -6,11 +6,10 @@ use crate::util::Filesystem;
 use crate::util::Platform;
 use crate::util::ProcessExecutor;
 use indexmap::IndexMap;
-use shirabe_pcre::Preg;
 use shirabe_php_shim::{
     Exception, PHP_EOL, PhpMixed, PhpResource, chdir, date_local, explode, fclose, feof, fgets,
-    file_get_contents, fopen, fwrite, gethostname, json_decode_assoc, php_regex, str_replace_array,
-    strcmp, strlen, strpos, strrpos, substr, time, trim,
+    file_get_contents, fopen, fwrite, gethostname, json_decode_assoc, php_regex, preg_replace,
+    str_replace_array, strcmp, strlen, strpos, strrpos, substr, time, trim,
 };
 use shirabe_symfony_process::ExecutableFinder;
 use shirabe_symfony_process::Process;
@@ -660,7 +659,7 @@ impl Perforce {
             for line in &res_array {
                 let res_bits = explode(" ", line);
                 if res_bits.len() > 4 {
-                    let branch = Preg::replace(
+                    let branch = preg_replace(
                         php_regex!(r"/[^A-Za-z0-9 ]/"),
                         "",
                         &res_bits.get(4).cloned().unwrap_or_default(),