Add minunit test framework (#168)

* add minunit tests

* fix logging

* ignore unexisting time service on embedded targets

* fix warning, issue with printf

* add exitcode

* migrate to printf

* indicate test by leds

* add testing description

* redesigned minunit tests to allow testing in separate files

* add test step for local target

* add failure test

* add restore test_check

* testing description

Co-authored-by: rusdacent <rusdacentx0x08@gmail.com>
Co-authored-by: DrZlo13 <who.just.the.doctor@gmail.com>

applications/tests/minunit_vars_ex.h

@@ -0,0 +1,15 @@
+#pragma once
+#include "minunit.h"
+
+/*  Misc. counters */
+extern int minunit_run;
+extern int minunit_assert;
+extern int minunit_fail;
+extern int minunit_status;
+
+/*  Timers */
+extern double minunit_real_timer;
+extern double minunit_proc_timer;
+
+/*  Last message */
+extern char minunit_last_message[MINUNIT_MESSAGE_LEN];