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_api.c

@@ -0,0 +1,73 @@
+#include "dialogs_i.h"
+#include "dialogs_api_lock.h"
+
+/****************** File select ******************/
+
+bool dialog_file_select_show(
+    DialogsApp* context,
+    const char* path,
+    const char* extension,
+    char* result,
+    uint8_t result_size,
+    const char* preselected_filename) {
+    FuriApiLock lock = API_LOCK_INIT_LOCKED();
+    furi_check(lock != NULL);
+
+    DialogsAppData data = {
+        .file_select = {
+            .path = path,
+            .extension = extension,
+            .result = result,
+            .result_size = result_size,
+            .preselected_filename = preselected_filename,
+        }};
+
+    DialogsAppReturn return_data;
+    DialogsAppMessage message = {
+        .lock = lock,
+        .command = DialogsAppCommandFileOpen,
+        .data = &data,
+        .return_data = &return_data,
+    };
+
+    furi_check(osMessageQueuePut(context->message_queue, &message, 0, osWaitForever) == osOK);
+    API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(lock);
+
+    return return_data.bool_value;
+}
+
+/****************** Message ******************/
+
+DialogMessageButton dialog_message_show(DialogsApp* context, const DialogMessage* dialog_message) {
+    FuriApiLock lock = API_LOCK_INIT_LOCKED();
+    furi_check(lock != NULL);
+
+    DialogsAppData data = {
+        .dialog = {
+            .message = dialog_message,
+        }};
+
+    DialogsAppReturn return_data;
+    DialogsAppMessage message = {
+        .lock = lock,
+        .command = DialogsAppCommandDialog,
+        .data = &data,
+        .return_data = &return_data,
+    };
+
+    furi_check(osMessageQueuePut(context->message_queue, &message, 0, osWaitForever) == osOK);
+    API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(lock);
+
+    return return_data.dialog_value;
+}
+
+/****************** Storage error ******************/
+
+void dialog_message_show_storage_error(DialogsApp* context, const char* error_text) {
+    DialogMessage* message = dialog_message_alloc();
+    dialog_message_set_text(message, error_text, 88, 32, AlignCenter, AlignCenter);
+    dialog_message_set_icon(message, &I_SDQuestion_35x43, 5, 6);
+    dialog_message_set_buttons(message, "Back", NULL, NULL);
+    dialog_message_show(context, message);
+    dialog_message_free(message);
+}