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/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);