CCID App: Refactor (#3808)

- Move iso7816 related code to its own folder
- Refactor Iso7816Callback into Iso7816Handler
- Created new file for CCID commands
- Renamed variables according to standard

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

applications/debug/ccid_test/iso7816/iso7816_t0_apdu.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <stdint.h>
+#include "iso7816_atr.h"
+#include "core/common_defines.h"
+
+#define ISO7816_READ_COMMAND_APDU_OK                 0
+#define ISO7816_READ_COMMAND_APDU_ERROR_WRONG_LE     1
+#define ISO7816_READ_COMMAND_APDU_ERROR_WRONG_LENGTH 2
+
+typedef struct {
+    //header
+    uint8_t CLA;
+    uint8_t INS;
+    uint8_t P1;
+    uint8_t P2;
+
+    //body
+    uint16_t Lc; //data length
+    uint16_t Le; //maximum response data length expected by client
+
+    //Le can have value of 0x00, which actually meand 0x100 = 256
+    bool LePresent;
+    uint8_t Data[0];
+} FURI_PACKED ISO7816_Command_APDU;
+
+typedef struct {
+    uint8_t SW1;
+    uint8_t SW2;
+    uint16_t DataLen;
+    uint8_t Data[0];
+} FURI_PACKED ISO7816_Response_APDU;
+
+uint8_t iso7816_read_command_apdu(
+    ISO7816_Command_APDU* command,
+    const uint8_t* pc_to_reader_datablock,
+    uint32_t pc_to_reader_datablock_len);
+void iso7816_write_response_apdu(
+    const ISO7816_Response_APDU* response,
+    uint8_t* reader_to_pc_datablock,
+    uint32_t* reader_to_pc_datablock_len);