feat: migrate to golang

internal/editor/editor.go

@@ -0,0 +1,57 @@
+// Package editor opens files in the user's preferred text editor.
+package editor
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"runtime"
+)
+
+// commonEditors mirrors utils.py's fallback editor list.
+var commonEditors = []string{"code", "subl", "atom", "vim", "nano", "notepad"}
+
+// GetEditorCommand returns the command for the system's default editor,
+// prioritizing EDITOR/VISUAL env vars, then falling back to common editors.
+func GetEditorCommand() string {
+	if editor := os.Getenv("EDITOR"); editor != "" {
+		return editor
+	}
+	if editor := os.Getenv("VISUAL"); editor != "" {
+		return editor
+	}
+
+	editors := commonEditors
+	if runtime.GOOS == "windows" {
+		editors = append([]string{"notepad"}, editors...)
+	}
+
+	for _, cmd := range editors {
+		if path, err := exec.LookPath(cmd); err == nil {
+			return path
+		}
+	}
+
+	return ""
+}
+
+// OpenFileInEditor opens a file in the system default editor. Returns true
+// if successful, false otherwise.
+func OpenFileInEditor(filePath string) bool {
+	editor := GetEditorCommand()
+	if editor == "" {
+		fmt.Println("❌ No editor found. Please set EDITOR or VISUAL environment variable")
+		return false
+	}
+
+	cmd := exec.Command(editor, filePath)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if err := cmd.Run(); err != nil {
+		fmt.Printf("❌ Failed to open editor: %v\n", err)
+		return false
+	}
+	return true
+}