added markdown support

pkg/cat/cater.go

@@ -3,6 +3,7 @@ package cat
 import (
 	"fmt"
 	"os"
+	"slices"
 	"strings"
 )
 
@@ -47,9 +48,42 @@ func (c Cater) Ignored(ignore ignorer) Cater {
 func (c Cater) ToString(delemiter string) string {
 	var sb strings.Builder
 
-	for name, content := range c {
+	names := make([]string, 0, len(c))
+	for name := range c {
+		names = append(names, name)
+	}
+
+	slices.Sort(names)
+
+	for _, name := range names {
 		sb.WriteString(fmt.Sprintf(delemiter, name))
-		sb.WriteString(content)
+		sb.WriteString(c[name])
+	}
+
+	return sb.String()
+}
+
+func (c Cater) ToMarkdown() string {
+	var sb strings.Builder
+
+	names := make([]string, 0, len(c))
+	for name := range c {
+		names = append(names, name)
+	}
+
+	slices.Sort(names)
+
+	for _, name := range names {
+		// write header
+		for range strings.Count(name, "/") {
+			sb.WriteString("#")
+		}
+		sb.WriteString(fmt.Sprintf(" %s\n\n", name))
+
+		splited := strings.Split(name, ".")
+
+		// write content
+		sb.WriteString(fmt.Sprintf("``` %s\n%s\n```\n\n", splited[len(splited)-1], c[name]))
 	}
 
 	return sb.String()