Description:
The `nitropy` command from `python-pynitrokey` version 0.4.35-1 does not work properly without the `python-protobuf` package.

When `python-protobuf` (version 21.12-1) is installed nitropy works correctly.
Verified by running `nitropy list` without an error.

Without `python-protobuf` installed, running `nitropy list` returns the following error:
```
Critical error:
An unhandled exception occurred
Exception encountered: ModuleNotFoundError("No module named 'google'")
```

Potential fix?: Add `python-protobuf` to dependencies of `python-pynitrokey`


The written log contains this traceback:
```
Traceback (most recent call last):
File "/usr/lib/python3.10/site-packages/pynitrokey/cli/__init__.py", line 129, in main
nitropy()
File "/usr/lib/python3.10/site-packages/click/core.py", line 1130, in __call__
return self.main(*args, **kwargs)
File "/usr/lib/python3.10/site-packages/click/core.py", line 1055, in main
rv = self.invoke(ctx)
File "/usr/lib/python3.10/site-packages/click/core.py", line 1657, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/lib/python3.10/site-packages/click/core.py", line 1404, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/lib/python3.10/site-packages/click/core.py", line 760, in invoke
return __callback(*args, **kwargs)
File "/usr/lib/python3.10/site-packages/pynitrokey/cli/__init__.py", line 113, in list
_list()
File "/usr/lib/python3.10/site-packages/pynitrokey/cli/__init__.py", line 106, in _list
nk3.commands["list"].callback()
File "/usr/lib/python3.10/site-packages/pynitrokey/cli/nk3/__init__.py", line 138, in list
for device in list_nk3():
File "/usr/lib/python3.10/site-packages/pynitrokey/nk3/__init__.py", line 24, in list
devices.extend(bootloader.list())
File "/usr/lib/python3.10/site-packages/pynitrokey/nk3/bootloader/__init__.py", line 115, in list
from .nrf52 import Nitrokey3BootloaderNrf52
File "/usr/lib/python3.10/site-packages/pynitrokey/nk3/bootloader/nrf52.py", line 27, in <module>
from .nrf52_upload.dfu.init_packet_pb import InitPacketPB
File "/usr/lib/python3.10/site-packages/pynitrokey/nk3/bootloader/nrf52_upload/dfu/init_packet_pb.py", line 39, in <module>
from . import dfu_cc_pb2 as pb
File "/usr/lib/python3.10/site-packages/pynitrokey/nk3/bootloader/nrf52_upload/dfu/dfu_cc_pb2.py", line 7, in <module>
from google.protobuf import descriptor as _descriptor
ModuleNotFoundError: No module named 'google'
664 DEBUG root print: Critical error:
664 DEBUG root print: An unhandled exception occurred
664 ERROR root No module named 'google'
```

Steps to reproduce error case:
- `pacman -S python-pynitrokey`
- have `python-protobuf` _not_ installed
- run `nitropy list`

Steps to reproduce correct behavior:
- `pacman -S python-pynitrokey python-protobuf`
- run `nitropy list`