refactor(opencode): improve startup time by 38% (#30453)

Co-authored-by: starptech <starptech@starptechs-MBP.fritz.box>

packages/opencode/src/cli/cmd/serve.ts

@@ -1,5 +1,4 @@
 import { Effect } from "effect"
-import { Server } from "../../server/server"
 import { effectCmd } from "../effect-cmd"
 import { withNetworkOptions, resolveNetworkOptions } from "../network"
 import { Flag } from "@opencode-ai/core/flag/flag"
@@ -12,6 +11,7 @@ export const ServeCommand = effectCmd({
   // need for an ambient project InstanceContext at startup.
   instance: false,
   handler: Effect.fn("Cli.serve")(function* (args) {
+    const { Server } = yield* Effect.promise(() => import("../../server/server"))
     if (!Flag.OPENCODE_SERVER_PASSWORD) {
       console.log("Warning: OPENCODE_SERVER_PASSWORD is not set; server is unsecured.")
     }