feat!: Handle transparency/nodata bit masks

[kylebarron]

TIFF supports storing nodata values in a transparency bitmask.

Instead of exposing the raw bitmask itself to users, I decided that it would be a better API to expose a Vec<bool> in the TypedArray. This requires a copy from the bitmask to the Vec<bool>.

In the future, we could add some sort of BooleanArray abstraction like Arrow that interprets the raw bits, but I think this is fine for now.

Then in the Python API we expose the Vec<bool> zero-copy through the buffer protocol as a uint8 array.

Change list

• Adds Bool variant to DataType.
• Adds Bool(Vec<bool>) variant to TypedArray.
• Python: Expose boolean data through buffer protocol. The Vec<bool> is exposed as a uint8 array of 0/1 values
• Python: Fix: Expose .shape as tuple[int, int, int], not as list[int]
• Python: Add test with vantor data