[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_cli.c

@@ -0,0 +1,59 @@
+#include <cli/cli.h>
+#include <furi.h>
+#include <rpc/rpc.h>
+#include <furi-hal-vcp.h>
+
+typedef struct {
+    Cli* cli;
+    bool session_close_request;
+} CliRpc;
+
+#define CLI_READ_BUFFER_SIZE 100
+
+static void rpc_send_bytes_callback(void* context, uint8_t* bytes, size_t bytes_len) {
+    furi_assert(context);
+    furi_assert(bytes);
+    furi_assert(bytes_len);
+    CliRpc* cli_rpc = context;
+
+    cli_write(cli_rpc->cli, bytes, bytes_len);
+}
+
+static void rpc_session_close_callback(void* context) {
+    furi_assert(context);
+    CliRpc* cli_rpc = context;
+
+    cli_rpc->session_close_request = true;
+}
+
+void rpc_cli_command_start_session(Cli* cli, string_t args, void* context) {
+    Rpc* rpc = context;
+
+    RpcSession* rpc_session = rpc_session_open(rpc);
+    if(rpc_session == NULL) {
+        printf("Another session is in progress\r\n");
+        return;
+    }
+
+    CliRpc cli_rpc = {.cli = cli, .session_close_request = false};
+    rpc_session_set_context(rpc_session, &cli_rpc);
+    rpc_session_set_send_bytes_callback(rpc_session, rpc_send_bytes_callback);
+    rpc_session_set_close_callback(rpc_session, rpc_session_close_callback);
+
+    uint8_t* buffer = furi_alloc(CLI_READ_BUFFER_SIZE);
+    size_t size_received = 0;
+
+    while(1) {
+        size_received = furi_hal_vcp_rx_with_timeout(buffer, CLI_READ_BUFFER_SIZE, 50);
+        if(!furi_hal_vcp_is_connected() || cli_rpc.session_close_request) {
+            break;
+        }
+
+        if(size_received) {
+            rpc_session_feed(rpc_session, buffer, size_received, 3000);
+        }
+    }
+
+    rpc_session_close(rpc_session);
+    free(buffer);
+}