Initial QSfera import

Server/vendor/github.com/gookit/goutil/byteutil/README.md

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+# Bytes Util
+
+Provide some common bytes util functions.
+
+## Install
+
+```shell
+go get github.com/gookit/goutil/byteutil
+```
+
+## Go docs
+
+- [Go docs](https://pkg.go.dev/github.com/gookit/goutil/byteutil)
+
+## Functions API
+
+> **Note**: doc by run `go doc ./byteutil`
+
+```go
+func AppendAny(dst []byte, v any) []byte
+func FirstLine(bs []byte) []byte
+func IsNumChar(c byte) bool
+func Md5(src any) []byte
+func Random(length int) ([]byte, error)
+func SafeString(bs []byte, err error) string
+func StrOrErr(bs []byte, err error) (string, error)
+func String(b []byte) string
+func ToString(b []byte) string
+type Buffer struct{ ... }
+func NewBuffer() *Buffer
+type BytesEncoder interface{ ... }
+type ChanPool struct{ ... }
+func NewChanPool(maxSize int, width int, capWidth int) *ChanPool
+type StdEncoder struct{ ... }
+func NewStdEncoder(encFn func(src []byte) []byte, decFn func(src []byte) ([]byte, error)) *StdEncoder
+```
+
+## Code Check & Testing
+
+```bash
+gofmt -w -l ./
+golint ./...
+```
+
+**Testing**:
+
+```shell
+go test -v ./byteutil/...
+```
+
+**Test limit by regexp**:
+
+```shell
+go test -v -run ^TestSetByKeys ./byteutil/...
+```