* Documentation: add Doxyfile, prepare sources for doxygen. * Update ReadMe and remove obsolete CLA * Add contribution guide * Contributing: update text * Correct spelling
* gpio: rename gpio application * bq25896: add reading OTG config * furi-hal-power: add is_otg_enabled API * gpio: introduce new GPIO app, add OTG enable / disable * variable-item-list: add enter callback * gpio: add output test view and scene * gpio app: fix GpioItemTester -> GpioItemTest Co-authored-by: あく <alleteam@gmail.com>