init: hgmj server initial commit

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

common/export/interface.go

@@ -0,0 +1,20 @@
+package export
+
+type Rower interface {
+	GetCells() []interface{}
+}
+
+type ExcelSheeter interface {
+	GetSheetName() string
+	GetRows() []Rower
+}
+
+type TitleSlice []string
+
+func (t TitleSlice) GetCells() []interface{} {
+	list := []interface{}{}
+	for _, v := range t {
+		list = append(list, v)
+	}
+	return list
+}