fix(miniapps): propagate wujieConfig to ecosystem.json for remote miniapps

[Gaubee]

Problem

Remote miniapps (like rwa-hub) are missing runtime and wujieConfig fields in the deployed ecosystem.json.

Current deployed ecosystem.json:

{
  "id": "xin.dweb.rwahub",
  "url": "./rwa-hub/"
  // Missing: runtime, wujieConfig
}

Expected:

{
  "id": "xin.dweb.rwahub",
  "url": "./rwa-hub/",
  "runtime": "wujie",
  "wujieConfig": { "rewriteAbsolutePaths": true }
}

Root Cause

This commit was in the original feat/wujie-container-refactor branch but got lost during PR #265 merge.

Fix

• Export RemoteMiniappConfig type from vite-plugin-remote-miniapps.ts
• Add remoteMiniapps parameter to MiniappsPluginOptions
• Pass remote config to scanRemoteMiniappsForBuild to extract runtime and wujieConfig
• Extract remoteMiniappsConfig as shared variable in vite.config.ts