[FL-1955] CLI RPC (#781)

- RPC: added CLI command to start session - all input bytes goes into RPC, all RPC output goes into VCP
- RPC: added command to close session (actually it only notifies transport layer)
- RPC: added recursive rmdir
- RPC: hard-coded listing for root directory (any, ext, int)
- Fixed CLI leak
- Fixed furi_record_delete leak
- Unit tests: repaired
- Unit tests: corrected output - remove excess, change dots with progress spinner
- Unit tests: added leak check
- Unit tests: SD mount check before start

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

applications/rpc/rpc_i.h

@@ -1,9 +1,10 @@
 #pragma once
 #include "rpc.h"
-#include "pb.h"
-#include "pb_decode.h"
-#include "pb_encode.h"
-#include "flipper.pb.h"
+#include <pb.h>
+#include <pb_decode.h>
+#include <pb_encode.h>
+#include <flipper.pb.h>
+#include <cli/cli.h>
 
 typedef void* (*RpcSystemAlloc)(Rpc*);
 typedef void (*RpcSystemFree)(void*);
@@ -15,8 +16,8 @@ typedef struct {
     void* context;
 } RpcHandler;
 
-void rpc_encode_and_send(Rpc* rpc, PB_Main* main_message);
-void rpc_encode_and_send_empty(Rpc* rpc, uint32_t command_id, PB_CommandStatus status);
+void rpc_send_and_release(Rpc* rpc, PB_Main* main_message);
+void rpc_send_and_release_empty(Rpc* rpc, uint32_t command_id, PB_CommandStatus status);
 void rpc_add_handler(Rpc* rpc, pb_size_t message_tag, RpcHandler* handler);
 
 void* rpc_system_status_alloc(Rpc* rpc);
@@ -25,3 +26,4 @@ void rpc_system_storage_free(void* ctx);
 void* rpc_system_app_alloc(Rpc* rpc);
 
 void rpc_print_message(const PB_Main* message);
+void rpc_cli_command_start_session(Cli* cli, string_t args, void* context);