Feat v0.5.2 chat surface (#32)

Co-authored-by: Jeffrey Smith <jasafpro@gmail.com>
Co-committed-by: Jeffrey Smith <jasafpro@gmail.com>

packages/chat/manifest.json

@@ -0,0 +1,30 @@
+{
+  "id": "chat",
+  "title": "Chat",
+  "type": "full",
+  "tier": "starlark",
+  "route": "/s/chat",
+  "auth": "authenticated",
+  "layout": "single",
+  "version": "0.1.0",
+  "icon": "\ud83d\udcac",
+  "description": "Chat surface — conversations, messaging, typing indicators, read receipts.",
+  "author": "switchboard",
+
+  "permissions": ["db.write", "realtime.publish"],
+
+  "depends": ["chat-core"],
+
+  "api_routes": [
+    {"method": "POST", "path": "/typing/*"}
+  ],
+
+  "settings": {
+    "enter_to_send": {
+      "type": "boolean",
+      "label": "Enter to Send",
+      "description": "Press Enter to send messages (Shift+Enter for newline). When off, Enter inserts a newline.",
+      "default": true
+    }
+  }
+}