[FL-1958] U2F prototype (#879)

* U2F implementation prototype
* U2F data encryption and store, user confirmation request
* remove debug prints
* fix notification bug in chrome
* split u2f_alloc into u2f_init and u2f_alloc
* typo fix, furi-hal-trng -> furi-hal-random
* rand/srand redefinition
* SubGhz: a little bit of Dante.
* u2f_data naming fix

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

applications/subghz/subghz.c

@@ -1,7 +1,4 @@
-/*
-*    Give up hope, everyone who enters here!!!
-*      Оставь надежду, всяк сюда входящий!!!
-*/
+/* Abandon hope, all ye who enter here. */
 
 #include "subghz_i.h"
 #include <lib/toolbox/path.h>
@@ -329,4 +326,4 @@ int32_t subghz_app(void* p) {
     subghz_free(subghz);
 
     return 0;
-}
+}