Vendor debugpy for VS Code attach debugging

Bundles debugpy 1.7.0 directly in python/ so "Maya: Attach (debugpy)"
works with no per-machine pip install step. Installed via Maya 2022's
own pip so it resolved a version actually compatible with Python 3.7
(Maya 2022's interpreter), then verified import + listen() succeeds
under all three target Maya Python versions (3.7/3.9/3.10).

Also fixes a latent __file__-under-exec() bug in
start_debug_server.py (same pitfall as Maya's own plugin loader,
never hit until this exercised it) and corrects the README's Maya
Python version claim -- 2022 ships Python 3.7, not 3.9 as previously
stated, which was never independently verified until now.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

python/debugpy/_vendored/pydevd/tests_runfiles/samples/nested_dir/__init__.py

@@ -0,0 +1 @@
+

python/debugpy/_vendored/pydevd/tests_runfiles/samples/nested_dir/nested2/__init__.py

@@ -0,0 +1 @@
+

python/debugpy/_vendored/pydevd/tests_runfiles/samples/nested_dir/nested2/deep_nest_test.py

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+import unittest
+
+class SampleTest(unittest.TestCase):
+    
+    def setUp(self):
+        return
+
+    def tearDown(self):
+        return
+
+    def test_non_unique_name(self):
+        pass
+
+    def test_asdf2(self):
+        pass
+
+    def test_i_am_a_unique_test_name(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()

python/debugpy/_vendored/pydevd/tests_runfiles/samples/nested_dir/nested2/non_test_file.py

@@ -0,0 +1,3 @@
+
+""" i am a python file with no tests """
+pass

python/debugpy/_vendored/pydevd/tests_runfiles/samples/nested_dir/nested3/__init__.py

@@ -0,0 +1 @@
+

python/debugpy/_vendored/pydevd/tests_runfiles/samples/nested_dir/nested3/non_test_file.py

@@ -0,0 +1,3 @@
+
+""" i am a python file with no tests """
+pass

python/debugpy/_vendored/pydevd/tests_runfiles/samples/nested_dir/non_test_file.py

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+
+""" i am a python file with no tests """
+pass

python/debugpy/_vendored/pydevd/tests_runfiles/samples/nested_dir/simple4_test.py

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+import unittest
+
+class NestedSampleTest(unittest.TestCase):
+    
+    def setUp(self):
+        return
+
+    def tearDown(self):
+        return
+
+    def test_non_unique_name(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()

python/debugpy/_vendored/pydevd/tests_runfiles/samples/non_test_file.py

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+
+""" i am a python file with no tests """
+pass

python/debugpy/_vendored/pydevd/tests_runfiles/samples/simple2_test.py

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+import unittest
+
+class YetAnotherSampleTest(unittest.TestCase):
+    
+    def setUp(self):
+        return
+
+    def tearDown(self):
+        return
+
+    def test_abc(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()

python/debugpy/_vendored/pydevd/tests_runfiles/samples/simple3_test.py

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+import unittest
+
+class StillYetAnotherSampleTest(unittest.TestCase):
+    
+    def setUp(self):
+        return
+
+    def tearDown(self):
+        return
+
+    def test_non_unique_name(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()

python/debugpy/_vendored/pydevd/tests_runfiles/samples/simpleClass_test.py

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+import unittest
+
+class SetUpClassTest(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        raise ValueError("This is an INTENTIONAL value error in setUpClass.")
+
+    def test_blank(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()

python/debugpy/_vendored/pydevd/tests_runfiles/samples/simpleModule_test.py

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+import unittest
+
+def setUpModule():
+    raise ValueError("This is an INTENTIONAL value error in setUpModule.")
+
+class SetUpModuleTest(unittest.TestCase):
+    
+    def setUp(cls):
+        pass
+
+    def test_blank(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()

python/debugpy/_vendored/pydevd/tests_runfiles/samples/simple_test.py

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+import unittest
+
+class SampleTest(unittest.TestCase):
+    
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def test_xxxxxx1(self):
+        self.fail('Fail test 2')
+    def test_xxxxxx2(self):
+        pass
+    def test_xxxxxx3(self):
+        pass
+    def test_xxxxxx4(self):
+        pass
+    def test_non_unique_name(self):
+        print('non unique name ran')
+
+
+class AnotherSampleTest(unittest.TestCase):
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def test_1(self):
+        pass
+    def test_2(self):
+        """ im a doc string"""
+        pass
+    def todo_not_tested(self):
+        '''
+        Not there by default!
+        '''
+
+
+if __name__ == '__main__':
+#    suite = unittest.makeSuite(SampleTest, 'test')
+#    runner = unittest.TextTestRunner( verbosity=3 )
+#    runner.run(suite)
+    unittest.main()