refactor: move some classes and functions to separate files

task6/entities.py

@@ -0,0 +1,21 @@
+from dataclasses import dataclass
+from typing import Literal
+
+
+@dataclass
+class Request:
+    request_time: int
+    plane: Plane
+
+@dataclass
+class ProcessedRequest(Request):
+    start_process_time: int
+    process_time: int
+    type_: Literal["landing", "launching"]
+
+class Plane:
+    __id_increment = 0
+
+    def __init__(self) -> None:
+        self.id = self.__id_increment
+        Plane.__id_increment += 1