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/app/registered_routers/entity.py

@@ -1,34 +1,27 @@
-from typing import Iterator
+from typing import Iterator, Optional
 
 from argenta.router import Router
 
 
 class RegisteredRouters:
-    def __init__(self, registered_routers: list[Router] | None = None) -> None:
+    def __init__(self, registered_routers: Optional[list[Router]] = None) -> None:
         """
         Private. Combines registered routers
         :param registered_routers: list of the registered routers
         :return: None
         """
-        self._registered_routers = registered_routers if registered_routers else []
+        self.registered_routers: list[Router] = registered_routers if registered_routers else []
 
-    def get_registered_routers(self) -> list[Router]:
-        """
-        Private. Returns the registered routers
-        :return: registered routers as list[Router]
-        """
-        return self._registered_routers
-
-    def add_registered_router(self, router: Router) -> None:
+    def add_registered_router(self, router: Router, /) -> None:
         """
         Private. Adds a new registered router
         :param router: registered router
         :return: None
         """
-        self._registered_routers.append(router)
+        self.registered_routers.append(router)
 
     def __iter__(self) -> Iterator[Router]:
-        return iter(self._registered_routers)
+        return iter(self.registered_routers)
 
     def __next__(self) -> Router:
-        return next(iter(self._registered_routers))
+        return next(iter(self.registered_routers))