Merge pull request #2 from eryajf/main

更新依赖包go-gpt3的版本,解决超时参数不生效的问题

style(file): remove some files

feat(chat): improve text limit

fix(error): fix error return type

fix(error): type error

feat(context): fix context logic

feat(context): close handle

feat(context): timeout chan

fix(chat): set timeout

fix(chat): limit context