feat: impl docs (#4)

The entire public api is covered with documentation in two languages - Russian and English.

the library now supports the latest three versions of python - 3.12, 3.13 and 3.14

minor design changes: now, when a Boolean flag is entered, its value is an empty string, not None.

tests have been adapted to the supported versions of python, readmi has been redesigned in two languages, German is no longer available.

tests/system_tests/test_system_handling_non_standard_behavior.py

@@ -1,14 +1,15 @@
-import _io
-from unittest.mock import patch, MagicMock
-from unittest import TestCase
 import io
 import re
 import sys
+from unittest import TestCase
+from unittest.mock import MagicMock, patch
 
+import _io
+
+from argenta import App, Orchestrator, Router
 from argenta.command import Command, PredefinedFlags
-from argenta.command.flag.models import ValidationStatus
 from argenta.command.flag.flags.models import Flags
-from argenta import Orchestrator, App, Router
+from argenta.command.flag.models import ValidationStatus
 from argenta.response import Response
 
 

tests/system_tests/test_system_handling_normal_behavior.py

@@ -1,16 +1,17 @@
-import _io
-from unittest.mock import patch, MagicMock
-from unittest import TestCase
 import io
 import re
 import sys
+from unittest import TestCase
+from unittest.mock import MagicMock, patch
 
+import _io
+
+from argenta import App, Orchestrator, Router
 from argenta.command import Command, PredefinedFlags
-from argenta.command.flag.models import PossibleValues, ValidationStatus
-from argenta.response import Response
-from argenta import Orchestrator, App, Router
 from argenta.command.flag import Flag
 from argenta.command.flag.flags import Flags
+from argenta.command.flag.models import PossibleValues, ValidationStatus
+from argenta.response import Response
 
 
 class PatchedArgvTestCase(TestCase):