Support the full set of chat space types

The PRD calls for company, division, department, project, pod and ad-hoc
spaces, but only company, department, project and direct were accepted. Add
division, pod and ad_hoc to the command contract, the service whitelist and the
new-space dialog. The space_type column is free text, so no migration is
needed.

AgentCompany-New/src/shared/commands.ts

@@ -140,7 +140,7 @@ export interface DeleteMessageInput {
 
 export interface CreateChatSpaceInput {
   orgId: string;
-  spaceType: "company" | "department" | "project" | "direct";
+  spaceType: "company" | "division" | "department" | "project" | "pod" | "ad_hoc" | "direct";
   name: string;
   topic: string;
   visibility: "workspace" | "restricted";