pybricksdev.cli: initialize thread to MTA on Windows

This fixes crashes like the following due to changes in Bleak that
detects issues on Windows where callbacks won't be called because
the pythoncom package sets the threading model to STA and there is
no Windows message loop running.

By initializing the thread to MTA before pythoncom is (lazy) imported,
we avoid this issue.

Issue: hbldh/bleak#1607 (comment)

```
Traceback (most recent call last):
  File "C:\Users\david\work\pybricksdev\.venv\Scripts\\pybricksdev", line 6, in <module>
    sys.exit(main())
             ^^^^^^
  File "C:\Users\david\work\pybricksdev\pybricksdev\cli\__init__.py", line 387, in main
    asyncio.run(subparsers.choices[args.tool].tool.run(args))
  File "C:\Users\david\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "C:\Users\david\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\david\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 650, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "C:\Users\david\work\pybricksdev\pybricksdev\cli\lwp3\repl.py", line 134, in repl
    device = await BleakScanner.find_device_by_filter(match_lwp3_uuid)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\david\work\pybricksdev\.venv\Lib\site-packages\bleak\__init__.py", line 444, in find_device_by_filter
    async with cls(**kwargs) as scanner:
  File "C:\Users\david\work\pybricksdev\.venv\Lib\site-packages\bleak\__init__.py", line 158, in __aenter__
    await self._backend.start()
  File "C:\Users\david\work\pybricksdev\.venv\Lib\site-packages\bleak\backends\winrt\scanner.py", line 225, in start
    await assert_mta()
  File "C:\Users\david\work\pybricksdev\.venv\Lib\site-packages\bleak\backends\winrt\util.py", line 149, in assert_mta
    raise BleakError(
bleak.exc.BleakError: Thread is configured for Windows GUI but callbacks are not working. Suspect unwanted side effects from importing 'pythoncom'.
```

CHANGELOG.md

@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - Use relative paths when compiling multi-file projects.
 
+### Fixed
+- Fixed `pybricksdev` BLE commands not working on Windows when `pythoncom`
+  package is present in environment.
+
 ## [1.0.0-alpha.48] - 2024-05-04
 
 ### Changed

pybricksdev/cli/__init__.py

@@ -343,6 +343,15 @@ async def run(self, args: argparse.Namespace):
 def main():
     """Runs ``pybricksdev`` command line interface."""
 
+    if sys.platform == "win32":
+        # Hack around bad side-effects of pythoncom on Windows
+        try:
+            from bleak_winrt._winrt import MTA, init_apartment
+        except ImportError:
+            from winrt._winrt import MTA, init_apartment
+
+        init_apartment(MTA)
+
     # Provide main description and help.
     parser = argparse.ArgumentParser(
         prog=PROG_NAME,