Code Cleanup: unused includes, useless checks, unused variables, etc... (#3696)

* Remove unnecessary checks
* Sublime: never insert missing headers
* Cleanup furi defines use
* Cleanup startup. Cleanup linker scripts. Explicitly define all interrupts hadlers, including uninmplemented one.
* Startup routine in C
* Drop assembler startup
* Move linker defines to stm32wb55_linker.h, cleanup naming, unify usage. Mpu: protect last 32b of main stack. Document various obscure things.
* Move furi_hal_switch documentation to appropriate place, use 0x0 for updater jump.
* UnitTests: move all temporary test files into tmp folder

---------

Co-authored-by: SG <who.just.the.doctor@gmail.com>

applications/services/cli/cli.c

@@ -19,7 +19,6 @@ Cli* cli_alloc(void) {
     cli->session = NULL;
 
     cli->mutex = furi_mutex_alloc(FuriMutexTypeNormal);
-    furi_check(cli->mutex);
 
     cli->idle_sem = furi_semaphore_alloc(1, 0);
 

applications/services/dolphin/dolphin.c

@@ -99,8 +99,8 @@ void dolphin_event_send_async(Dolphin* dolphin, DolphinEvent* event) {
 void dolphin_event_send_wait(Dolphin* dolphin, DolphinEvent* event) {
     furi_assert(dolphin);
     furi_assert(event);
+
     event->flag = furi_event_flag_alloc();
-    furi_check(event->flag);
     furi_check(
         furi_message_queue_put(dolphin->event_queue, event, FuriWaitForever) == FuriStatusOk);
     furi_check(

applications/services/gui/modules/popup.c

@@ -112,7 +112,6 @@ Popup* popup_alloc(void) {
     Popup* popup = malloc(sizeof(Popup));
     popup->view = view_alloc();
     popup->timer = furi_timer_alloc(popup_timer_callback, FuriTimerTypeOnce, popup);
-    furi_assert(popup->timer);
     popup->timer_period_in_ms = 1000;
     popup->timer_enabled = false;
 

applications/services/gui/view.c

@@ -78,7 +78,6 @@ void view_allocate_model(View* view, ViewModelType type, size_t size) {
     } else if(view->model_type == ViewModelTypeLocking) {
         ViewModelLocking* model = malloc(sizeof(ViewModelLocking));
         model->mutex = furi_mutex_alloc(FuriMutexTypeRecursive);
-        furi_check(model->mutex);
         model->data = malloc(size);
         view->model = model;
     } else {