refactored the base classes

src/music_kraken/utils/exception/__init__.py

@@ -0,0 +1 @@
+__all__ = ["config"]

src/music_kraken/utils/exception/config.py

@@ -0,0 +1,25 @@
+class SettingException(Exception):
+    pass
+
+
+class SettingNotFound(SettingException):
+    def __init__(self, setting_name: str):
+        self.setting_name = setting_name
+
+
+class SettingValueError(SettingException):
+    def __init__(self, setting_name: str, setting_value: str, rule: str):
+        """
+        The rule has to be such, that the following format makes sense:
+        {name} {rule}, not '{value}'
+
+        :param setting_name:
+        :param setting_value:
+        :param rule:
+        """
+        self.setting_name = setting_name
+        self.setting_value = setting_value
+        self.rule = rule
+
+    def __str__(self):
+        return f"{self.setting_name} {self.rule}, not '{self.setting_value}'"