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/notification/notification_app.h

@@ -0,0 +1,56 @@
+#include <furi.h>
+#include <furi_hal.h>
+#include "notification.h"
+#include "notification_messages.h"
+
+#define NOTIFICATION_LED_COUNT 3
+#define NOTIFICATION_EVENT_COMPLETE 0x00000001U
+
+typedef enum {
+    NotificationLayerMessage,
+    InternalLayerMessage,
+    SaveSettingsMessage,
+} NotificationAppMessageType;
+
+typedef struct {
+    const NotificationSequence* sequence;
+    NotificationAppMessageType type;
+    osEventFlagsId_t back_event;
+} NotificationAppMessage;
+
+typedef enum {
+    LayerInternal = 0,
+    LayerNotification = 1,
+    LayerMAX = 2,
+} NotificationLedLayerIndex;
+
+typedef struct {
+    uint8_t value[LayerMAX];
+    NotificationLedLayerIndex index;
+    Light light;
+} NotificationLedLayer;
+
+#define NOTIFICATION_SETTINGS_VERSION 0x01
+#define NOTIFICATION_SETTINGS_PATH "/int/notification.settings"
+
+typedef struct {
+    uint8_t version;
+    float display_brightness;
+    float led_brightness;
+    float speaker_volume;
+    uint32_t display_off_delay_ms;
+    bool vibro_on;
+} NotificationSettings;
+
+struct NotificationApp {
+    osMessageQueueId_t queue;
+    FuriPubSub* event_record;
+    osTimerId_t display_timer;
+
+    NotificationLedLayer display;
+    NotificationLedLayer led[NOTIFICATION_LED_COUNT];
+
+    NotificationSettings settings;
+};
+
+void notification_message_save_settings(NotificationApp* app);