feat(shared-collections): admit 'topic' and 'queue' collection kinds (D2/D3)

Widen the group_collections kind allow-list (migration 0064) + the
manifest CollectionKind enum + apply_service COLLECTION_KINDS to include
'topic' (D2, storeless publish namespace) and 'queue' (D3, group-keyed
durable queue — store lands in 0065). Foundation shared by both
milestones; routes through the existing owner-generic reconcile +
resolve_owning_group path.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/picloud-cli/src/manifest.rs

@@ -270,6 +270,12 @@ pub enum CollectionKind {
     Kv,
     Docs,
     Files,
+    /// §11.6 D2: a storeless group-scoped publish namespace, watched by
+    /// `shared = true` group pubsub triggers.
+    Topic,
+    /// §11.6 D3: a group-keyed durable queue with competing per-descendant
+    /// consumers.
+    Queue,
 }
 
 impl CollectionKind {
@@ -279,6 +285,8 @@ impl CollectionKind {
             Self::Kv => "kv",
             Self::Docs => "docs",
             Self::Files => "files",
+            Self::Topic => "topic",
+            Self::Queue => "queue",
         }
     }
 }