Refactor application structure and initialize core components

I decided to rewrite the program taking into account the experience gained.

internal/controller/error.go

@@ -0,0 +1,16 @@
+package controller
+
+import (
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/application/setting"
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/gui/view"
+)
+
+func (c *controller) startWithError(err error) {
+	languages := c.app.GetSetting().GetLanguages()
+
+	content := view.StartWithError(err, languages, func(lang setting.Lang) {
+		_ = setting.ChangeLang(lang)
+		c.startWithError(err)
+	})
+	c.window.SetContent(content)
+}