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/cmds/projects/CmdBuild.py

@@ -5,7 +5,7 @@ import os
 import re
 
 from functools import lru_cache
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, override
 
 from ...App import Scope
 from ...lib.log import DEBUG, ERR, NOTICE, log
@@ -22,6 +22,7 @@ class CmdBuild(Cmd):  # export
     def __init__(self, parent: Parent) -> None:
         super().__init__(parent, 'build', help = 'janware software project build tool')
 
+    @override
     def add_arguments(self, parser: ArgumentParser) -> None:
         super().add_arguments(parser)
         parser.add_argument(
@@ -90,6 +91,7 @@ class CmdBuild(Cmd):  # export
             help = 'Modules to be built',
         )
 
+    @override
     async def _run(self, args: Namespace) -> None:
 
         @lru_cache(maxsize = None)