Lfdfiles

- Fix variable length little-endian base 128 decoding.

- Improve typing.
- Deprecate Python 3.9, support Python 3.13.

- Fix docstring examples not correctly rendered on GitHub.

- Support NumPy 2.

- Fix decoding 32-bit, 16 windows, 4 channels Spartan6 FBD files (1).

- 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).