added function based middleware i18n example

examples/middleware/function_based/i18n_gettext/keyboards.py

@@ -0,0 +1,23 @@
+from telebot.types import InlineKeyboardMarkup, InlineKeyboardButton
+
+
+def languages_keyboard():
+    return InlineKeyboardMarkup(
+        keyboard=[
+            [
+                InlineKeyboardButton(text="English", callback_data='en'),
+                InlineKeyboardButton(text="Русский", callback_data='ru'),
+                InlineKeyboardButton(text="O'zbekcha", callback_data='uz_Latn')
+            ]
+        ]
+    )
+
+
+def clicker_keyboard(_):
+    return InlineKeyboardMarkup(
+        keyboard=[
+            [
+                InlineKeyboardButton(text=_("click"), callback_data='click'),
+            ]
+        ]
+    )