feat: add featured doctors and health packages APIs

backend/prisma/migrations/20260623120651_featured_field_for_doctor/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Doctor" ADD COLUMN     "isFeatured" BOOLEAN NOT NULL DEFAULT false;

backend/prisma/schema.prisma

@@ -27,6 +27,7 @@ model Doctor {
   workingStatus String?
   qualification String?
   isActive      Boolean  @default(true)
+  isFeatured   Boolean   @default(false)
   globalSortOrder Int    @default(1000)
   specializations DoctorSpecialization[]
   professionalSummary String? @db.Text