* fix: convert static variables to instance members to enable supporting sampling multiple sensors

Replace static variables `prev_count` and `prev_time` with instance
member variables to support multiple AS5600 sensor instances running
simultaneously. Previously, all instances would share the same static
variables, causing incorrect position and velocity calculations in
multi-sensor configurations.

- Add `prev_count_` and `prev_time_` as class member variables
- Initialize `prev_count_` to 0 and `prev_time_` to current time
- Remove static keyword from variables in `update()` method
- Ensures each sensor instance maintains independent state

* fix(as5600): initialize prev_count_ to prevent incorrect first diff

Initialize prev_count_ to the first sensor reading in init() to avoid
calculating an incorrect diff on the first update() call. Previously,
prev_count_ defaulted to 0 while count_ was set to the actual sensor
reading, causing a large erroneous jump in the accumulator on startup.

- Set prev_count_ = count after reading initial angle
- Ensures diff calculation is correct from the first update
- Prevents accumulator corruption on initialization

* refactor(as5600): align implementation with MT6701 encoder

- Replace std::chrono::high_resolution_clock with esp_timer_get_time()
- Convert prev_time_ to uint64_t prev_time_us_ for microsecond precision
- Store prev_count as local variable instead of class member

* Fix (AS5600): Used read_counts() instead of non-existant read() method and cleaned the code.

- Used read_counts() method instead of the wrongly used non-existed read() method
- Removed unnecessary trailing white spaces

…t for starting/stopping timer/task. Allow compile-time selection of task vs timer usage (#572)

* feat(mt6701/as5600): Improve encoder interchangability and add support for starting/stopping timer/task. Allow compile-time selection of task vs timer usage

* address comments

* allow callers to configure task for as5600/mt6701 if using task instead of timer

#574)

…t enabling pin filtering prevents light sleep (#575)

…the appropriate display driver closes #573 (#576)

* feat(m5tab5): Add support for querying and automatically determining the appropriate display driver
closes #573

* updated with fixes and improvements from @CarbonNeuron (thanks!)

* updated st7123 display driver

* minor update