Initial QSfera import

Server/vendor/github.com/gookit/goutil/x/stdio/iface.go

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+package stdio
+
+import "io"
+
+// Flusher interface
+type Flusher interface {
+	Flush() error
+}
+
+// Syncer interface
+type Syncer interface {
+	Sync() error
+}
+
+// FlushWriter is the interface satisfied by logging destinations.
+type FlushWriter interface {
+	Flusher
+	// Writer the output writer
+	io.Writer
+}
+
+// FlushCloseWriter is the interface satisfied by logging destinations.
+type FlushCloseWriter interface {
+	Flusher
+	// WriteCloser the output writer
+	io.WriteCloser
+}
+
+// SyncCloseWriter is the interface satisfied by logging destinations.
+// such as os.File
+type SyncCloseWriter interface {
+	Syncer
+	// WriteCloser the output writer
+	io.WriteCloser
+}