[FL-2957] Unified Info API, App Error, Data Xchange (#1998)

* Update protobuf definitions
* Add Property subsystem entry point function
* Key-based system info and power info function stubs
* Remove unneeded functions
* Working power info
* Working system info
* Replace #defines with string literals
* Remove unneeded field
* Simplify system info formatting
* Refactor output callback handling
* Handle the last info element correctly
* Optimise power info, rename methods
* Add comments
* Add power debug
* Remove unneeded definitions
* Rename some files and functions
* Update protobuf definitions
* Implement App GetError and DataExchange APIs
* Send GetErrorReply with correct command_id
* Add RPC debug app stub
* Add more scenes
* Add warning, increase stack size
* Add receive data exchange scene
* Improve data exchange
* Add notifications
* Update application requirements
* Bump format version for property-based infos
* Correctly reset error text
* RCP: sync protobuf repo to latest release tag

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

applications/debug/rpc_debug_app/rpc_debug_app.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <furi.h>
+#include <gui/gui.h>
+#include <gui/view.h>
+#include <gui/scene_manager.h>
+#include <gui/view_dispatcher.h>
+
+#include <gui/modules/widget.h>
+#include <gui/modules/submenu.h>
+#include <gui/modules/text_box.h>
+#include <gui/modules/text_input.h>
+#include <gui/modules/byte_input.h>
+
+#include <rpc/rpc_app.h>
+#include <notification/notification_messages.h>
+
+#include "scenes/rpc_debug_app_scene.h"
+
+#define DATA_STORE_SIZE 64U
+#define TEXT_STORE_SIZE 64U
+
+typedef struct {
+    Gui* gui;
+    RpcAppSystem* rpc;
+    SceneManager* scene_manager;
+    ViewDispatcher* view_dispatcher;
+    NotificationApp* notifications;
+
+    Widget* widget;
+    Submenu* submenu;
+    TextBox* text_box;
+    TextInput* text_input;
+    ByteInput* byte_input;
+
+    char text_store[TEXT_STORE_SIZE];
+    uint8_t data_store[DATA_STORE_SIZE];
+} RpcDebugApp;
+
+typedef enum {
+    RpcDebugAppViewWidget,
+    RpcDebugAppViewSubmenu,
+    RpcDebugAppViewTextBox,
+    RpcDebugAppViewTextInput,
+    RpcDebugAppViewByteInput,
+} RpcDebugAppView;
+
+typedef enum {
+    // Reserve first 100 events for button types and indexes, starting from 0
+    RpcDebugAppCustomEventInputErrorCode = 100,
+    RpcDebugAppCustomEventInputErrorText,
+    RpcDebugAppCustomEventInputDataExchange,
+    RpcDebugAppCustomEventRpcDataExchange,
+} RpcDebugAppCustomEvent;