feat(plugin): discover and list plugin-provided commands

Port Application::getPluginCommands: resolve the local composer with
plugins force-enabled, fall back to Factory::createGlobal, and collect
commands from CommandProvider capability adapters. PhpCommandProxy now
mirrors name/description/aliases/hidden over RPC so `list` output
matches upstream; input definitions remain TODO(plugin).

PhpClass::php_class_name returns an owned String because PHP-backed
proxies only know their class at runtime (the override-skip warning
prints get_class). CommandProvider::getCommands hands out shared
Rc<RefCell> handles since the commands are stored in the application.

Factory::createGlobal now propagates createConfig errors instead of
swallowing them, and Application::getComposer only catches the
exception classes upstream catches, so a ParsingException reaches
doRun's GithubActionError path as in Composer.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/crates/shirabe/src/repository/vcs.rs b/crates/shirabe/src/repository/vcs.rs
index 920fefa3..cb20735c 100644
--- a/crates/shirabe/src/repository/vcs.rs
+++ b/crates/shirabe/src/repository/vcs.rs
@@ -140,7 +140,7 @@ impl VcsDriverKind {
 
 impl PhpClass for VcsDriverKind {
     /// Used as the fallback driver name in `getRepoName()`.
-    fn php_class_name(&self) -> &'static str {
+    fn php_class_name(&self) -> String {
         match self {
             VcsDriverKind::GitHub => r"Composer\Repository\Vcs\GitHubDriver",
             VcsDriverKind::GitLab => r"Composer\Repository\Vcs\GitLabDriver",
@@ -152,5 +152,6 @@ impl PhpClass for VcsDriverKind {
             VcsDriverKind::Fossil => r"Composer\Repository\Vcs\FossilDriver",
             VcsDriverKind::Svn => r"Composer\Repository\Vcs\SvnDriver",
         }
+        .to_string()
     }
 }