chore: isolate frontend and backend via npm workspaces and @mmapp/contracts

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/routes/alerts.ts

@@ -16,7 +16,7 @@ import {
   putRulesSchema,
   putTelegramSchema,
   testTelegramSchema,
-} from "../../../packages/contracts/dist/alerts.js"
+} from "@mmapp/contracts/alerts"
 
 const alertsRoutes: FastifyPluginAsyncZod = async (app) => {
   app.get("/alerts", async (_req, reply) => {

backend/src/routes/events.ts

@@ -1,5 +1,5 @@
 import type { FastifyPluginAsyncZod } from "@fastify/type-provider-zod"
-import { appendEventsSchema, listEventsQuerySchema } from "../../../packages/contracts/dist/events.js"
+import { appendEventsSchema, listEventsQuerySchema } from "@mmapp/contracts/events"
 import { appendEvents, readEvents } from "../modules/events/service/events-service.js"
 
 const eventsRoutes: FastifyPluginAsyncZod = async (app) => {