Refactor server code to use vectors instead of maps.

* Use critical sections to access characteristic/descriptor value data.

* Remove unnecessary code

* Create characteristic semaphore only if needed for indications.

* Fix advertising when not broadcasting a service.

src/NimBLE2904.h

@@ -31,6 +31,7 @@ struct BLE2904_Data {
 
 } __attribute__((packed));
 
+
 /**
  * @brief Descriptor for Characteristic Presentation Format.
  *