Lfdfiles

- Remove phasor and lifetime methods from VistaIfli (breaking).
- Rename SimfcsFbd and SimfcsFbf to FlimboxFbd and FlimboxFbf (breaking).
- Deprecate SimfcsFbd and SimfcsFbf.
- Support int16 FLIMbox cross correlation phase indices (bins).
- Add FlimboxFbs class for ISS VistaVision FLIMbox settings.
- Add decoder for 32-bit, 16 windows, 4 channels FlimboxFbd (untested).

- Rewrite VistaIfli based on file format specification (breaking).
- Define positional and keyword parameters (breaking).
- SimfcsFbd.asarray returns bins only (breaking).

- Fix type hint issues.
- Add py.typed marker.

- Specify encoding of text files.
- Fix linting issues.

- Improve type hints.
- Drop support for Python 3.8 and numpy < 1.21 (NEP29).

- Fix setup.py.