added get query to mission store

apps/dispatch/app/api/mission/route.ts

@@ -0,0 +1,14 @@
+import { Prisma, prisma } from "@repo/db";
+import { NextRequest, NextResponse } from "next/server";
+
+export const GET = (req: NextRequest) => {
+	const filter = req.nextUrl.searchParams.get("filter") as
+		| Prisma.MissionWhereInput
+		| undefined;
+
+	const missions = prisma.mission.findMany({
+		where: filter,
+	});
+
+	return NextResponse.json(missions);
+};