logger/slog: initial import

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

logger/slog/options.go

@@ -0,0 +1,27 @@
+package slog
+
+import "go.unistack.org/micro/v3/logger"
+
+type sourceKey struct{}
+
+func WithSourceKey(v string) logger.Option {
+	return logger.SetOption(sourceKey{}, v)
+}
+
+type timeKey struct{}
+
+func WithTimeKey(v string) logger.Option {
+	return logger.SetOption(timeKey{}, v)
+}
+
+type messageKey struct{}
+
+func WithMessageKey(v string) logger.Option {
+	return logger.SetOption(messageKey{}, v)
+}
+
+type levelKey struct{}
+
+func WithLevelKey(v string) logger.Option {
+	return logger.SetOption(levelKey{}, v)
+}