ref: typehints, enum instead of raw string, abc and other (#1)

Full code coverage with annotations, fixing errors in various linters: ruff, wps, etc. Fixing errors in type checkers: ty, mypy, pyright. Formatting and bringing code to a consistent style, applying best practices in various aspects.

src/argenta/router/exceptions.py

@@ -1,9 +1,12 @@
+from typing import override
+
+
 class RepeatedFlagNameException(Exception):
     """
     Private. Raised when a repeated flag name is registered
     """
-
-    def __str__(self):
+    @override
+    def __str__(self) -> str:
         return "Repeated registered flag names in register command"
 
 
@@ -11,8 +14,8 @@ class TooManyTransferredArgsException(Exception):
     """
     Private. Raised when too many arguments are passed
     """
-
-    def __str__(self):
+    @override
+    def __str__(self) -> str:
         return "Too many transferred arguments"
 
 
@@ -20,8 +23,8 @@ class RequiredArgumentNotPassedException(Exception):
     """
     Private. Raised when a required argument is not passed
     """
-
-    def __str__(self):
+    @override
+    def __str__(self) -> str:
         return "Required argument not passed"
 
 
@@ -29,6 +32,6 @@ class TriggerContainSpacesException(Exception):
     """
     Private. Raised when there is a space in the trigger being registered
     """
-
-    def __str__(self):
+    @override
+    def __str__(self) -> str:
         return "Command trigger cannot contain spaces"