This is more dependable, and when we know the package name we can
glob inside it to get all files such as bin or ttf files.

This will allow e.g., 5x8.bin & ov5640_autofocus.bin within
bundles.

the behavior of bundlefly and circup when encountering .bin files
needs to be checked.

Tested by building modified pycamera bundle and the autofocus.bin file
appears in the generated zip files:
```
pycamera-py-ec67bde/lib/adafruit_pycamera/ov5640_autofocus.bin 4077 4096
pycamera-8.x-mpy-ec67bde/lib/adafruit_pycamera/ov5640_autofocus.bin 4077 4096
pycamera-9.x-mpy-ec67bde/lib/adafruit_pycamera/ov5640_autofocus.bin 4077 4096
```

There's at least one library in the bundle that has incorrect metadata
and that leads to an error:
    adafruit/Adafruit_CircuitPython_Colorsys#29

(it's smaller on disk)