add generate_cheatsheet script

script is generating markdown document with small cheatsheet
in selected language

scripts/generate_cheatsheet.go

@@ -0,0 +1,41 @@
+// run:
+//   LANG=en go run generate_cheatsheet.go
+// to generate Keybindings_en.md file in current directory
+// change LANG to generate cheatsheet in different language (if supported)
+
+package main
+
+import (
+	"os"
+	"fmt"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/app"
+	"github.com/jesseduffield/lazygit/pkg/config"
+)
+
+func main() {
+	appConfig, _ := config.NewAppConfig("", "", "", "", "", new(bool))
+	a, _ := app.NewApp(appConfig)
+	lang := a.Tr.GetLanguage()
+	name := "Keybindings_" + lang + ".md"
+	bindings := a.Gui.GetKeybindings()
+	file, _ := os.Create(name)
+	current := ""
+	content := ""
+
+	file.WriteString("# Lazygit " + a.Tr.SLocalize("help"))
+
+	for _, binding := range bindings {
+		if key := a.Gui.GetKey(binding); key != "" && binding.Description != "" {
+			if binding.ViewName != current {
+				current = binding.ViewName
+				title := a.Tr.SLocalize(strings.Title(current) + "Title")
+				content = fmt.Sprintf("</pre>\n\n## %s\n<pre>\n", title)
+				file.WriteString(content)
+			}
+			content = fmt.Sprintf("\t<kbd>%s</kbd>:\t%s\n", key, binding.Description)
+			file.WriteString(content)
+		}
+	}
+}