UNLEASHED:: TX Power setting to SubGhz App

* Works in Read, and Read RAW.
* You can now adjust the TX power for testing devices without desyncing them from inside
* Lets you do RTL testing etc on very low power.

CODE REFACTORED, subghz_txrx_set_tx_power added.

applications/main/subghz/subghz_i.h

@@ -93,7 +93,7 @@ struct SubGhz {
 
     uint16_t idx_menu_chosen;
     SubGhzLoadTypeFile load_type_file;
-
+    uint32_t tx_power;
     void* rpc_ctx;
 };