feat: added configuration center function (#3035)

Co-authored-by: aiden.ma <Aiden.ma@yijinin.com>

core/configcenter/unmarshaler_test.go

@@ -0,0 +1,28 @@
+package configurator
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRegisterUnmarshaler(t *testing.T) {
+	RegisterUnmarshaler("test", func(data []byte, v interface{}) error {
+		return nil
+	})
+
+	_, ok := Unmarshaler("test")
+	assert.True(t, ok)
+
+	_, ok = Unmarshaler("test2")
+	assert.False(t, ok)
+
+	_, ok = Unmarshaler("json")
+	assert.True(t, ok)
+
+	_, ok = Unmarshaler("toml")
+	assert.True(t, ok)
+
+	_, ok = Unmarshaler("yaml")
+	assert.True(t, ok)
+}