Skorp sub ghz add protocol (#581)

* SubGhz: Add Star Line protocol
* Rollback ReadMe changes
* SubGhz: add shared keystore for keeloq derived protocols.
* SubGhz: add missing key load routine

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

lib/fl_subghz/subghz_keystore.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <m-string.h>
+#include <m-array.h>
+#include <stdint.h>
+
+typedef struct {
+    string_t name;
+    uint64_t key;
+    uint16_t type;
+} SubGhzKey;
+
+ARRAY_DEF(SubGhzKeyArray, SubGhzKey, M_POD_OPLIST)
+
+#define M_OPL_SubGhzKeyArray_t() ARRAY_OPLIST(SubGhzKeyArray, M_POD_OPLIST)
+
+typedef struct SubGhzKeystore SubGhzKeystore;
+
+SubGhzKeystore* subghz_keystore_alloc();
+
+void subghz_keystore_free(SubGhzKeystore* instance);
+
+void subghz_keystore_load(SubGhzKeystore* instance, const char* filename);
+
+SubGhzKeyArray_t* subghz_keystore_get_data(SubGhzKeystore* instance);