Initial QSfera import

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

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+# Env Util
+
+Provide some commonly system or go ENV util functions.
+
+## Install
+
+```shell
+go get github.com/gookit/goutil/envutil
+```
+
+## Go docs
+
+- [Go docs](https://pkg.go.dev/github.com/gookit/goutil/envutil)
+
+## Functions API
+
+> **Note**: doc by run `go doc ./envutil`
+
+```go
+func Environ() map[string]string
+func GetBool(name string, def ...bool) bool
+func GetInt(name string, def ...int) int
+func Getenv(name string, def ...string) string
+func HasShellEnv(shell string) bool
+func IsConsole(out io.Writer) bool
+func IsGithubActions() bool
+func IsLinux() bool
+func IsMSys() bool
+func IsMac() bool
+func IsSupport256Color() bool
+func IsSupportColor() bool
+func IsSupportTrueColor() bool
+func IsTerminal(fd uintptr) bool
+func IsWSL() bool
+func IsWin() bool
+func IsWindows() bool
+func ParseEnvValue(val string) string
+func ParseValue(val string) (newVal string)
+func SetEnvs(mp map[string]string)
+func StdIsTerminal() bool
+func VarParse(val string) string
+func VarReplace(s string) string
+```
+
+## Code Check & Testing
+
+```bash
+gofmt -w -l ./
+golint ./...
+```
+
+**Testing**:
+
+```shell
+go test -v ./envutil/...
+```
+
+**Test limit by regexp**:
+
+```shell
+go test -v -run ^TestSetByKeys ./envutil/...
+```