* Furi: replace obsolete furiac_exit with osThreadExit, drop obsolete apis and test. Rename systemd to flipper and move to separate file, cleanup. ApiHal: Rename timebase to os and move freertos hooks there, move insomnia api to power module.
* Furi: new thread helper
* Furi: cleanup thread documentation
* Flipper, AppLoader: update to use FuriThread. Update tasks signatures to match FuriThreadCallback signature.
* F4: rename API_HAL_TIMEBASE_DEBUG to API_HAL_OS_DEBUG
* Applications: rename FuriApplication to FlipperApplication, use FuriThreadCallback signature for apps.
* C++ app template sample, new exit method
* gui test app
* aligned string draw functions
* add canvas_invert_color, canvas_draw_button_left, canvas_draw_button_right
* use new str and button fns in dialog
* real dialog mockup
* add new gui test app recipe
* submenu module init
* delete unused variable
* move buttons to element, add canvas_string_width fn, new center button element
* button icons
* submenu module
* use submenu module, switch views
* keyboard buttons img
* new font for keyboard
* text input (keyboard) module
* add text input to gui test app
* add gui tesst app to release build, fix flags
* handle transition from start and end position, fix input switch
* add long text support to text input
* canvas_string_width and the underlying u8g2_GetStrWidth now return uint16_t
* remove deprecated libs and apps
* canvas_font_max_height fn
* new element, aligned multiline text
* use multiline text instead of plain string
* fix second keyboard row, rename uppercase fn
* qwerty-like keyboard layout
* new icons for iButton app
* better dialog text position and events handling
* remove confusing comment
* new extended dialog module
* extended dialog module usage
* update docs
* new gui module, popup with timeout
* popup usage
* canvas, remove outdated canvas_font_max_height, use canvas_current_font_height
* use furi check
* use new view_enter and view_exit callback for timers
* add DrZlo to gui tester codeowner
Co-authored-by: aanper <mail@s3f.ru>
