Pubsub core api feature (#174)

* fixed inline functions for modern C standart

* pubsub api, base version

* basic test for pubsub

* update applications.mk, add test file

* more test for pubsub

* remove unimplemented files, cleanup header file

* remove legacy tests, check unsubscribe not call cb

* implement deleting mutex, fail test

* release mutex before deleting

Co-authored-by: aanper <mail@s3f.ru>

firmware/targets/local/Src/lo_os.c

@@ -253,3 +253,15 @@ osStatus_t osMutexRelease (osMutexId_t mutex_id) {
         return osError;
     }
 }
+
+osStatus_t osMutexDelete (osMutexId_t mutex_id) {
+    osMutexRelease(mutex_id);
+    
+    int res = 0;
+    if((res = pthread_mutex_destroy(&mutex_id->mutex)) == 0) {
+        return osOK;
+    } else {
+        printf("res = %d\n", res);
+        return osError;
+    }
+}