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/dialogs/dialogs_message.h

@@ -0,0 +1,46 @@
+#pragma once
+#include <furi.h>
+#include "dialogs_i.h"
+#include "dialogs_api_lock.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    const char* path;
+    const char* extension;
+    char* result;
+    uint8_t result_size;
+    const char* preselected_filename;
+} DialogsAppMessageDataFileSelect;
+
+typedef struct {
+    const DialogMessage* message;
+} DialogsAppMessageDataDialog;
+
+typedef union {
+    DialogsAppMessageDataFileSelect file_select;
+    DialogsAppMessageDataDialog dialog;
+} DialogsAppData;
+
+typedef union {
+    bool bool_value;
+    DialogMessageButton dialog_value;
+} DialogsAppReturn;
+
+typedef enum {
+    DialogsAppCommandFileOpen,
+    DialogsAppCommandDialog,
+} DialogsAppCommand;
+
+typedef struct {
+    FuriApiLock lock;
+    DialogsAppCommand command;
+    DialogsAppData* data;
+    DialogsAppReturn* return_data;
+} DialogsAppMessage;
+
+#ifdef __cplusplus
+}
+#endif