feat(channels): add google chat adapter and webhook route

src/config/schema.ts

@@ -418,6 +418,14 @@ const teamsSchema = z.object({
   require_mention: z.boolean().default(true),
 }).optional();
 
+const googleChatSchema = z.object({
+  service_account_key_file: z.string().optional(),
+  service_account_json: z.string().optional(),
+  webhook_token: z.string().optional(),
+  allowed_space_names: z.array(z.string()).default([]),
+  require_mention: z.boolean().default(true),
+}).optional();
+
 const browserSchema = z.object({
   enabled: z.boolean().default(false),
   executable_path: z.string().optional(),
@@ -586,6 +594,7 @@ export const configSchema = z.object({
   matrix: matrixSchema,
   signal: signalSchema,
   teams: teamsSchema,
+  google_chat: googleChatSchema,
   server: serverSchema.default({}),
   models: modelsSchema,
   backends: backendsSchema.default({}),
@@ -632,6 +641,7 @@ export type WhatsAppConfig = z.infer<typeof whatsappSchema>;
 export type MatrixConfig = z.infer<typeof matrixSchema>;
 export type SignalConfig = z.infer<typeof signalSchema>;
 export type TeamsConfig = z.infer<typeof teamsSchema>;
+export type GoogleChatConfig = z.infer<typeof googleChatSchema>;
 export type RetryPolicyConfig = z.infer<typeof retrySchema>;
 export type ContextLevel = z.infer<typeof contextLevelSchema>;
 export type PromptConfig = z.infer<typeof promptSchema>;