Feat v0.5.1 chat core (#31)

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

packages/chat-core/manifest.json

@@ -0,0 +1,80 @@
+{
+  "id": "chat-core",
+  "title": "Chat Core",
+  "type": "library",
+  "tier": "starlark",
+  "version": "0.1.0",
+  "description": "Core chat library — conversations, messages, participants, read cursors. Usable by other packages via lib.require().",
+  "author": "switchboard",
+
+  "permissions": ["db.write", "realtime.publish"],
+
+  "exports": [
+    "create", "send", "history",
+    "add_participant", "remove_participant", "mark_read"
+  ],
+
+  "api_routes": [
+    {"method": "GET",    "path": "/conversations"},
+    {"method": "POST",   "path": "/conversations"},
+    {"method": "GET",    "path": "/conversations/*"},
+    {"method": "PUT",    "path": "/conversations/*"},
+    {"method": "DELETE", "path": "/conversations/*"},
+    {"method": "GET",    "path": "/messages/*"},
+    {"method": "POST",   "path": "/messages/*"},
+    {"method": "PUT",    "path": "/messages/*"},
+    {"method": "DELETE", "path": "/messages/*"},
+    {"method": "GET",    "path": "/participants/*"},
+    {"method": "POST",   "path": "/participants/*"},
+    {"method": "DELETE", "path": "/participants/*"},
+    {"method": "POST",   "path": "/read/*"},
+    {"method": "GET",    "path": "/unread"}
+  ],
+
+  "db_tables": {
+    "conversations": {
+      "columns": {
+        "title":      "text",
+        "type":       "text",
+        "created_by": "text",
+        "updated_at": "text"
+      },
+      "indexes": [["created_by"], ["updated_at"]]
+    },
+    "participants": {
+      "columns": {
+        "conversation_id":  "text",
+        "participant_id":   "text",
+        "participant_type": "text",
+        "display_name":     "text",
+        "role":             "text",
+        "joined_at":        "text"
+      },
+      "indexes": [
+        ["conversation_id"],
+        ["participant_id"],
+        ["conversation_id", "participant_id"]
+      ]
+    },
+    "messages": {
+      "columns": {
+        "conversation_id": "text",
+        "participant_id":  "text",
+        "content":         "text",
+        "content_type":    "text",
+        "edited_at":       "text"
+      },
+      "indexes": [["conversation_id"]]
+    },
+    "read_cursors": {
+      "columns": {
+        "conversation_id":    "text",
+        "participant_id":     "text",
+        "last_read_message_id": "text"
+      },
+      "indexes": [["conversation_id", "participant_id"]]
+    }
+  },
+
+  "schema_version": 1
+}