transliteration-decoder: implement proper HTML escaping and add new transliteration model

modules/transliteration-decoder/index.py

@@ -4,8 +4,14 @@ command_length = len(command)
 def escaped_string(unescaped_string):
     result_string = str(unescaped_string)
 
-    for i in ["<", ">"]:
-        result_string = result_string.replace(i, f"\\{i}")
+    escaping_rules = {
+        "<": "&lt;",
+        ">": "&gt;",
+        '"': "&quot;"
+    }
+
+    for i in escaping_rules.items():
+        result_string = result_string.replace(i[0], i[1])
 
     return result_string
 
@@ -31,7 +37,7 @@ if (command[0] in self.aliases) and (1 <= command_length <= 3):
                         f"{', '.join(list(models.keys()))}"
     else:
         for i in models[chosen_model]:
-            decoded_text = decoded_text.replace(i[0], i[1])
+            decoded_text = decoded_text.replace(i[0].lower(), i[1].lower())
             decoded_text = decoded_text.replace(i[0].capitalize(), i[1].capitalize())
             decoded_text = decoded_text.replace(i[0].upper(), i[1].upper())