Agents protocol feedback (#750)

This includes some feedback on the agents protocol:

- Rename JobDescription to AgentDispatch
- Remove participant_identity entry in the dispatch
- Deprecate namespace
- Add an agent_name field to specify what agent workers a job should be dispatched to

This also allows setting a room configuration in the token.

.changeset/mighty-steaks-invite.md

@@ -0,0 +1,12 @@
+---
+"github.com/livekit/protocol": patch
+---
+
+Integrate feedback on the agents protocol:
+
+- Rename JobDescription to AgentDispatch
+- Remove participant_identity entry in the dispatch
+- Deprecate namespace
+- Add an agent_name field to specify what agent workers a job should be dispatched to
+
+Also allow setting a room configuration in the token.

auth/grants.go

@@ -33,6 +33,8 @@ type VideoGrant struct {
 	RoomAdmin bool   `json:"roomAdmin,omitempty"`
 	RoomJoin  bool   `json:"roomJoin,omitempty"`
 	Room      string `json:"room,omitempty"`
+	// Name of the room configuration to apply to the room if created
+	RoomConfiguration string `json:"room_configuration,omitempty"`
 
 	// permissions within a room, if none of the permissions are set explicitly
 	// it will be granted with all publish and subscribe permissions