add support for the go standard embed tag for locale files

_examples/i18n/template-embedded/main.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"embed"
+	"strings"
+	"text/template"
+
+	"github.com/kataras/iris/v12"
+)
+
+//go:embed locales/*
+var filesystem embed.FS
+
+func main() {
+	app := newApp()
+	app.Listen(":8080")
+}
+
+func newApp() *iris.Application {
+	app := iris.New()
+
+	// Set custom functions per locale!
+	app.I18n.Loader.Funcs = func(current iris.Locale) template.FuncMap {
+		return template.FuncMap{
+			"uppercase": func(word string) string {
+				return strings.ToUpper(word)
+			},
+		}
+	}
+
+	// Instead of:
+	// err := app.I18n.Load("./locales/*/*.ini", "en-US", "el-GR")
+	// Apply the below in order to build with embedded locales inside your executable binary.
+	err := app.I18n.LoadFS(filesystem, ".", "en-US", "el-GR")
+	if err != nil {
+		panic(err)
+	}
+
+	app.Get("/", func(ctx iris.Context) {
+		text := ctx.Tr("forms.register") // en-US: prints "Become a MEMBER".
+		ctx.WriteString(text)
+	})
+
+	app.Get("/title", func(ctx iris.Context) {
+		text := ctx.Tr("user.connections.Title") // en-US: prints "Accounts Connections".
+		ctx.WriteString(text)
+	})
+
+	return app
+}