* fix:(StreamDecoder) Integer map key may be truncated and populated unexpectedly
* feat: expose option `DefaultBufferSize`
* test adjust
* test adjust
* feat: add options to make default buffer size adjustable
* fix:move benchmarkTests and unitTests related to external json library
* remove extra spaces
* merge go.mod files
* refactor: add external_jsonlib_test into go.work and CI
Co-authored-by: Yi Duan <duanyi.aster@bytedance.com>