feat(plugins): hot reload des plugins sans relancer IdeA — use case ReloadPlugin (invalidation registry/catalogue, resultat hashes+changed), tools MCP d'administration plugin agent-facing (mcp/plugins.rs + PluginToolProvider), evenement domaine plugin_reloaded relaye sur le wire (dto/events), exposition openai_tools rafraichie, wiring app-tauri — #271/#269 (QA verte #273: application 32, mcp_server 38, openai_tools 10, plugin_install_load 5, plugin 10, wire 1 — 96 tests ciblés; app-tauri compile sans desktop runtime)

crates/app-tauri/src/lib.rs

@@ -410,6 +410,7 @@ pub fn run() {
             plugins::plugin_review_package,
             plugins::plugin_install_from_archive,
             plugins::plugin_install_from_directory,
+            plugins::plugin_reload,
             plugins::plugin_set_enabled,
             plugins::plugin_uninstall,
             plugins::plugin_list_runtime_contributions,