feat: v0.7.0 — registre de providers LLM : am providers list/show/add/remove/default, settings.providers + default_provider (closes #88)

src/events.rs

@@ -48,6 +48,8 @@ pub enum EventKind {
     Alert,
     /// One benchmark run of 'am lab' (issue #62).
     Lab,
+    /// LLM provider registry change: add, remove, default (issue #88).
+    Provider,
 }
 
 impl EventKind {
@@ -73,6 +75,7 @@ impl EventKind {
             EventKind::Cost => "cost",
             EventKind::Alert => "alert",
             EventKind::Lab => "lab",
+            EventKind::Provider => "provider",
         }
     }
 }