[FL-2627] Flipper applications: SDK, build and debug system (#1387)

* Added support for running applications from SD card (FAPs - Flipper Application Packages)
* Added plugin_dist target for fbt to build FAPs
* All apps of type FlipperAppType.EXTERNAL and FlipperAppType.PLUGIN are built as FAPs by default
* Updated VSCode configuration for new fbt features - re-deploy stock configuration to use them
* Added debugging support for FAPs with fbt debug & VSCode
* Added public firmware API with automated versioning

Co-authored-by: hedger <hedger@users.noreply.github.com>
Co-authored-by: SG <who.just.the.doctor@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/services/gui/modules/widget_elements/widget_element_button.c

@@ -0,0 +1,79 @@
+#include "widget_element_i.h"
+#include <gui/elements.h>
+#include <m-string.h>
+
+typedef struct {
+    GuiButtonType button_type;
+    string_t text;
+    ButtonCallback callback;
+    void* context;
+} GuiButtonModel;
+
+static void gui_button_draw(Canvas* canvas, WidgetElement* element) {
+    furi_assert(canvas);
+    furi_assert(element);
+    GuiButtonModel* model = element->model;
+
+    canvas_set_color(canvas, ColorBlack);
+    canvas_set_font(canvas, FontSecondary);
+
+    if(model->button_type == GuiButtonTypeLeft) {
+        elements_button_left(canvas, string_get_cstr(model->text));
+    } else if(model->button_type == GuiButtonTypeRight) {
+        elements_button_right(canvas, string_get_cstr(model->text));
+    } else if(model->button_type == GuiButtonTypeCenter) {
+        elements_button_center(canvas, string_get_cstr(model->text));
+    }
+}
+
+static bool gui_button_input(InputEvent* event, WidgetElement* element) {
+    GuiButtonModel* model = element->model;
+    bool consumed = false;
+
+    if(model->callback == NULL) return consumed;
+
+    if((model->button_type == GuiButtonTypeLeft) && (event->key == InputKeyLeft)) {
+        model->callback(model->button_type, event->type, model->context);
+        consumed = true;
+    } else if((model->button_type == GuiButtonTypeRight) && (event->key == InputKeyRight)) {
+        model->callback(model->button_type, event->type, model->context);
+        consumed = true;
+    } else if((model->button_type == GuiButtonTypeCenter) && (event->key == InputKeyOk)) {
+        model->callback(model->button_type, event->type, model->context);
+        consumed = true;
+    }
+
+    return consumed;
+}
+
+static void gui_button_free(WidgetElement* gui_button) {
+    furi_assert(gui_button);
+
+    GuiButtonModel* model = gui_button->model;
+    string_clear(model->text);
+    free(gui_button->model);
+    free(gui_button);
+}
+
+WidgetElement* widget_element_button_create(
+    GuiButtonType button_type,
+    const char* text,
+    ButtonCallback callback,
+    void* context) {
+    // Allocate and init model
+    GuiButtonModel* model = malloc(sizeof(GuiButtonModel));
+    model->button_type = button_type;
+    model->callback = callback;
+    model->context = context;
+    string_init_set_str(model->text, text);
+
+    // Allocate and init Element
+    WidgetElement* gui_button = malloc(sizeof(WidgetElement));
+    gui_button->parent = NULL;
+    gui_button->input = gui_button_input;
+    gui_button->draw = gui_button_draw;
+    gui_button->free = gui_button_free;
+    gui_button->model = model;
+
+    return gui_button;
+}