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

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

applications/settings/dolphin_passport/passport.c

@@ -90,8 +90,6 @@ static void render_callback(Canvas* canvas, void* ctx) {
 int32_t passport_app(void* p) {
     UNUSED(p);
     FuriSemaphore* semaphore = furi_semaphore_alloc(1, 0);
-    furi_assert(semaphore);
-
     ViewPort* view_port = view_port_alloc();
 
     Dolphin* dolphin = furi_record_open(RECORD_DOLPHIN);