refactor(php-shim): introduce PhpClass for reporting PHP class names

Rust has no runtime class name, so `Command::get_class` existed purely to
let each command hand back its PHP class name, supplied through the
two-argument variant of `delegate_command_trait_impls_to_inner!` at the
impl site. Replace it with a general `PhpClass` trait plus an
`impl_php_class!` macro, so the name is stated once next to the type
definition and the mechanism is reusable outside commands.

`Command` gains `PhpClass` as a supertrait and drops `get_class`, and
`VcsDriverKind`'s hand-rolled `php_class_name` table moves onto the trait.
Behavior is unchanged: the same class-name strings are reported, and the
base command state still panics when asked for a name it cannot supply.

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

1 files changed, 3 insertions, 4 deletions

diff --git a/crates/shirabe/src/command/depends_command.rs b/crates/shirabe/src/command/depends_command.rs
index 145d174a..a8910603 100644
--- a/crates/shirabe/src/command/depends_command.rs
+++ b/crates/shirabe/src/command/depends_command.rs
@@ -18,6 +18,8 @@ pub struct DependsCommand {
     colors: std::cell::RefCell<Vec<String>>,
 }
 
+shirabe_php_shim::impl_php_class!(DependsCommand, r"Composer\Command\DependsCommand");
+
 impl Default for DependsCommand {
     fn default() -> Self {
         Self::new()
@@ -122,10 +124,7 @@ impl Command for DependsCommand {
         crate::command::base_command::base_command_complete(self, input, suggestions)
     }
 
-    shirabe_external_packages::delegate_command_trait_impls_to_inner!(
-        base_command_data,
-        "Composer\\Command\\DependsCommand"
-    );
+    shirabe_external_packages::delegate_command_trait_impls_to_inner!(base_command_data);
 }
 
 impl BaseCommand for DependsCommand {