fix(format): restore format test dependencies

packages/opencode/test/format/format.test.ts

@@ -1,11 +1,13 @@
+import { NodeFileSystem } from "@effect/platform-node"
 import { describe, expect } from "bun:test"
-import { Effect } from "effect"
+import { Effect, Layer } from "effect"
 import { provideTmpdirInstance } from "../fixture/fixture"
 import { testEffect } from "../lib/effect"
+import * as CrossSpawnSpawner from "../../src/effect/cross-spawn-spawner"
 import { Format } from "../../src/format"
 import * as Formatter from "../../src/format/formatter"
 
-const it = testEffect(Format.defaultLayer)
+const it = testEffect(Layer.mergeAll(Format.defaultLayer, CrossSpawnSpawner.defaultLayer, NodeFileSystem.layer))
 
 describe("Format", () => {
   it.effect("status() returns built-in formatters when no config overrides", () =>