hooks : on_install/on_start/on_stop/on_update globaux (settings.hooks) et par projet (issue #34) - echec non bloquant, dry-run respecte, ordre global puis projet

src/config.rs

@@ -73,6 +73,10 @@ pub struct Settings {
     /// --theme flag overrides it).
     #[serde(default)]
     pub theme: Option<String>,
+    /// Lifecycle hooks: on_install / on_start / on_stop / on_update command
+    /// lines (global; project profiles can add their own).
+    #[serde(default)]
+    pub hooks: BTreeMap<String, Vec<String>>,
 }
 
 /// A project profile: everything am needs to know about one project.
@@ -497,6 +501,9 @@ pub fn merge(base: &mut Config, overlay: Config) {
     if o.self_update_repo.is_some() {
         s.self_update_repo = o.self_update_repo;
     }
+    for (k, v) in o.hooks {
+        s.hooks.insert(k, v);
+    }
     for (k, v) in overlay.aliases {
         base.aliases.insert(k, v);
     }