赵月辉 / fastgpt-migrated

* refactor: decouple engine packages from Next.js, improve ESM compatibility

* lodash -> lodash-es, prune global.d.ts

* refactor: decouple packages, improve ESM compatibility

* update api import

* fix: align Next API types and CI mocks

* doc

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Co-authored-by: Archer <545436317@qq.com>