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/auth_helper.rs b/crates/shirabe/src/util/auth_helper.rs
index 7d47f088..8d35d817 100644
--- a/crates/shirabe/src/util/auth_helper.rs
+++ b/crates/shirabe/src/util/auth_helper.rs
@@ -9,11 +9,10 @@ use crate::util::Bitbucket;
 use crate::util::GitHub;
 use crate::util::GitLab;
 use indexmap::IndexMap;
-use shirabe_pcre::Preg;
 use shirabe_php_shim::{
     PhpMixed, RuntimeException, base64_encode, explode, in_array_loose, in_array_strict, is_array,
-    is_string, json_decode_assoc, parse_url, php_regex, str_replace, strpos, strtolower, substr,
-    trim,
+    is_string, json_decode_assoc, parse_url, php_regex, preg_match2, str_replace, strpos,
+    strtolower, substr, trim,
 };
 
 #[derive(Debug)]
@@ -537,7 +536,7 @@ impl AuthHelper {
                 }
             } else if origin == "github.com" && password == "x-oauth-basic" {
                 // only add the access_token if it is actually a github API URL
-                if Preg::is_match(php_regex!(r"{^https?://api\.github\.com/}"), url) {
+                if preg_match2(php_regex!(r"{^https?://api\.github\.com/}"), url, 0).is_some() {
                     headers.push(PhpMixed::String(format!(
                         "Authorization: token {}",
                         username,