Merge pull request #13 from go-gorm/feature/read-write-connections

Update README

Split primary_key gen as single file

Merge pull request #5 from go-gorm/feature/pk

Move keygen to github.com/longbridgeapp/longkey

Use DoubleWrite until a better name

Merge pull request #4 from go-gorm/feature/config

improve config

Update go.dev badge