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, 2 deletions

diff --git a/crates/shirabe/src/command/script_alias_command.rs b/crates/shirabe/src/command/script_alias_command.rs
index 30d82779..713947f4 100644
--- a/crates/shirabe/src/command/script_alias_command.rs
+++ b/crates/shirabe/src/command/script_alias_command.rs
@@ -6,9 +6,9 @@ use crate::command::base_command::base_command_initialize;
 use crate::console::input::InputArgument;
 use crate::console::input::InputOption;
 use crate::util::Platform;
-use shirabe_pcre::Preg;
 use shirabe_php_shim::{
     InvalidArgumentException, LogicException, PhpMixed, impl_php_class, is_string, php_regex,
+    preg_replace2,
 };
 use shirabe_symfony_console::command::Command;
 use shirabe_symfony_console::input::InputInterface;
@@ -134,7 +134,8 @@ impl Command for ScriptAliasCommand {
         // TODO(symfony): InputInterface lacks to_string; use a placeholder until it is modeled.
         let input_as_string = String::new();
         let _ = input;
-        let script_alias_input = Preg::replace4(php_regex!(r"{^\S+ ?}"), "", &input_as_string, 1);
+        let script_alias_input =
+            preg_replace2(php_regex!(r"{^\S+ ?}"), "", &input_as_string, 1, None);
         let mut flags = indexmap::IndexMap::new();
         flags.insert(
             "script-alias-input".to_string(),