feat(file): add fff-backed search

packages/opencode/package.json

@@ -90,6 +90,7 @@
     "@aws-sdk/credential-providers": "3.993.0",
     "@clack/prompts": "1.0.0-alpha.1",
     "@effect/platform-node": "catalog:",
+    "@ff-labs/fff-node": "0.4.2",
     "@gitlab/gitlab-ai-provider": "3.6.0",
     "@gitlab/opencode-gitlab-auth": "1.3.3",
     "@hono/standard-validator": "0.1.5",
@@ -110,7 +111,6 @@
     "@solid-primitives/event-bus": "1.1.2",
     "@solid-primitives/scheduled": "1.5.2",
     "@standard-schema/spec": "1.0.0",
-    "@zip.js/zip.js": "2.7.62",
     "ai": "catalog:",
     "ai-gateway-provider": "2.3.1",
     "bonjour-service": "1.3.0",