[FL-2230] SubGhz: protocol API refactoring (#969)

* SubGhz: protocols library refactoring
* SubGhz: new architecture and refactoring
* SubGhz: simplify protocol structure, remove unused types
* SubGhz: rename Subghz to SubGhz
* SubGhz: add environment concept

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
Co-authored-by: DrZlo13 <who.just.the.doctor@gmail.com>

lib/subghz/protocols/registry.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "../types.h"
+
+const SubGhzProtocol* subghz_protocol_registry_get_by_name(const char* name);
+
+const SubGhzProtocol* subghz_protocol_registry_get_by_index(size_t index);
+
+size_t subghz_protocol_registry_count();