REFACTOR(repo): simplify project structure

- Move services/nextjs/ to nextjs/
- Move Dockerfile.prod to Dockerfile at root
- Remove deploy/ folder (K8s manifests moved to K3S-HOME/web-apps)
- Remove .gitea/ workflows
- Update GitHub Actions for new structure
- Remove develop branch triggers

nextjs/prisma/schema.prisma

@@ -0,0 +1,22 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+model Todo {
+  id          Int      @id @default(autoincrement())
+  title       String
+  description String?
+  completed   Boolean  @default(false)
+  priority    String   @default("medium")
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+}
+