[FL-2627] Flipper applications: SDK, build and debug system (#1387)

* Added support for running applications from SD card (FAPs - Flipper Application Packages)
* Added plugin_dist target for fbt to build FAPs
* All apps of type FlipperAppType.EXTERNAL and FlipperAppType.PLUGIN are built as FAPs by default
* Updated VSCode configuration for new fbt features - re-deploy stock configuration to use them
* Added debugging support for FAPs with fbt debug & VSCode
* Added public firmware API with automated versioning

Co-authored-by: hedger <hedger@users.noreply.github.com>
Co-authored-by: SG <who.just.the.doctor@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/debug/unit_tests/furi/furi_valuemutex_test.c

@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <string.h>
+#include <furi.h>
+
+#include "../minunit.h"
+
+void test_furi_valuemutex() {
+    const int init_value = 0xdeadbeef;
+    const int changed_value = 0x12345678;
+
+    int value = init_value;
+    bool result;
+    ValueMutex valuemutex;
+
+    // init mutex case
+    result = init_mutex(&valuemutex, &value, sizeof(value));
+    mu_assert(result, "init mutex failed");
+
+    // acquire mutex case
+    int* value_pointer = acquire_mutex(&valuemutex, 100);
+    mu_assert_pointers_eq(value_pointer, &value);
+
+    // second acquire mutex case
+    int* value_pointer_second = acquire_mutex(&valuemutex, 100);
+    mu_assert_pointers_eq(value_pointer_second, NULL);
+
+    // change value case
+    *value_pointer = changed_value;
+    mu_assert_int_eq(value, changed_value);
+
+    // release mutex case
+    result = release_mutex(&valuemutex, &value);
+    mu_assert(result, "release mutex failed");
+
+    // TODO
+    //acquire mutex blocking case
+    //write mutex blocking case
+    //read mutex blocking case
+
+    mu_check(delete_mutex(&valuemutex));
+}