chore(extractors/command): fix reportIncompatibleMethodOverride lints

This check is currently turned off in our `basic` `typeCheckingMode`
profile, but is enabled in the `standard` profile.

Things done here:

- removed the invalid cross inheritance, as the bases conflict on
  `extract` method

                 Extractor -> Command
                     ^            |
                     x            |
                     v            v
        DirectoryExtractor -> MultiFileCommand

Error:

    unblob/extractors/command.py
      unblob/extractors/command.py:106:9 - error: Method "extract" overrides class "Command" in an incompatible manner
        Parameter 2 name mismatch: base parameter is named "inpath", override parameter is named "paths" (reportIncompatibleMethodOverride)

Author: vlaci

unblob/extractors/command.py

@@ -102,9 +102,15 @@ def get_dependencies(self) -> list[str]:
         return [self._executable]
 
 
-class MultiFileCommand(Command, DirectoryExtractor):
+class MultiFileCommand(DirectoryExtractor):
+    def __init__(self, *args, **kwargs):
+        self._command = Command(*args, **kwargs)
+
     def extract(self, paths: list[Path], outdir: Path):
-        return super().extract(paths[0], outdir)
+        return self._command.extract(paths[0], outdir)
+
+    def get_dependencies(self) -> list[str]:
+        return self._command.get_dependencies()
 
 
 class InvalidCommandTemplate(ValueError):