refactor(seld-signal): extract seld/signal into the shirabe-seld-signal crate

Move `Seld\Signal` out of shirabe-external-packages and into its own
crate, so the path is `shirabe_seld_signal::SignalHandler` instead of
`shirabe_external_packages::seld::signal::SignalHandler`.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/crates/shirabe/src/util/process_executor.rs b/crates/shirabe/src/util/process_executor.rs
index 91c27fd0..97f4ed3d 100644
--- a/crates/shirabe/src/util/process_executor.rs
+++ b/crates/shirabe/src/util/process_executor.rs
@@ -6,7 +6,6 @@ use crate::io::io_interface;
 use crate::util::GitHub;
 use crate::util::Platform;
 use indexmap::IndexMap;
-use shirabe_external_packages::seld::signal::SignalHandler;
 use shirabe_pcre::{CaptureKey, Preg};
 use shirabe_php_shim::Catch as _;
 use shirabe_php_shim::{
@@ -15,6 +14,7 @@ use shirabe_php_shim::{
     php_regex, rtrim, str_replace, strcspn, strlen, strpbrk, strtolower, strtr_array,
     substr_replace, trim,
 };
+use shirabe_seld_signal::SignalHandler;
 use shirabe_symfony_process::ExecutableFinder;
 use shirabe_symfony_process::Process;
 use shirabe_symfony_process::ProcessMock;