App, lib, cmds: Fix mypy.explicit-override fallout

This commit adds @override decorators to approximately 300 methods
across 76 files that inherit from base classes such as AbstractCmd,
FileContext, ExecContext, Distro, SSHClient, and others.

The decorator ensures the type checker can verify that overridden
methods have compatible signatures and prevents accidental shadowing
of inherited methods without intent.

Files modified include command classes, library modules, distro
implementations, and SSH client implementations.

Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL with pi.dev v
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/App.py

@@ -10,7 +10,7 @@ import sys
 
 from enum import Enum, auto
 from functools import cache
-from typing import TYPE_CHECKING
+from typing import override, TYPE_CHECKING
 
 from .lib.App import App as Base
 from .lib.Distro import Distro
@@ -374,11 +374,13 @@ class App(Base):
                 default_pkg_filter = pkg_filter,
             )
 
+    @override
     async def __aexit__(self, exc_type, exc, tb) -> None:
         if self.__exec_context is not None:
             await self.__exec_context.close()
             self.__exec_context = None
 
+    @override
     def _add_arguments(self, parser) -> None:
         super()._add_arguments(parser)
         parser.add_argument('-t', '--topdir', default = None, help = 'Project Path')
@@ -421,6 +423,7 @@ class App(Base):
             help = 'Default filter for all distribution package-related operations',
         )
 
+    @override
     async def _run(self, args: argparse.Namespace) -> None:
         self.___topdir = args.topdir
         self.___pretty_topdir = self.__format_topdir(self.___topdir, args.topdir_format)