Naming and coding style convention, new linter tool. (#945)

* Makefile, Scripts: new linter
* About: remove ID from IC
* Firmware: remove double define for DIVC/DIVR
* Scripts: check folder names too. Docker: replace syntax check with make lint.
* Reformat Sources and Migrate to new file naming convention
* Docker: symlink clang-format-12 to clang-format
* Add coding style guide

applications/ibutton/ibutton_view_manager.h

@@ -0,0 +1,51 @@
+#pragma once
+#include <furi.h>
+#include <gui/view_dispatcher.h>
+#include <gui/modules/dialog_ex.h>
+#include <gui/modules/submenu.h>
+#include <gui/modules/text_input.h>
+#include <gui/modules/byte_input.h>
+#include <gui/modules/popup.h>
+#include <gui/modules/widget.h>
+#include "ibutton_event.h"
+
+class iButtonAppViewManager {
+public:
+    enum class Type : uint8_t {
+        iButtonAppViewTextInput,
+        iButtonAppViewByteInput,
+        iButtonAppViewSubmenu,
+        iButtonAppViewDialogEx,
+        iButtonAppViewPopup,
+        iButtonAppViewWidget,
+    };
+
+    osMessageQueueId_t event_queue;
+
+    iButtonAppViewManager();
+    ~iButtonAppViewManager();
+
+    void switch_to(Type type);
+
+    Submenu* get_submenu();
+    Popup* get_popup();
+    DialogEx* get_dialog_ex();
+    TextInput* get_text_input();
+    ByteInput* get_byte_input();
+    Widget* get_widget();
+
+    void receive_event(iButtonEvent* event);
+    void send_event(iButtonEvent* event);
+
+private:
+    ViewDispatcher* view_dispatcher;
+    DialogEx* dialog_ex;
+    Submenu* submenu;
+    TextInput* text_input;
+    ByteInput* byte_input;
+    Popup* popup;
+    Widget* widget;
+    Gui* gui;
+
+    uint32_t previous_view_callback(void* context);
+};