[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/desktop/desktop_settings.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "desktop_settings_filename.h"
+
+#include <furi_hal.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <toolbox/saved_struct.h>
+#include <storage/storage.h>
+
+#define DESKTOP_SETTINGS_VER (4)
+
+#define DESKTOP_SETTINGS_PATH INT_PATH(DESKTOP_SETTINGS_FILE_NAME)
+#define DESKTOP_SETTINGS_MAGIC (0x17)
+#define PIN_MAX_LENGTH 12
+
+#define DESKTOP_SETTINGS_RUN_PIN_SETUP_ARG "run_pin_setup"
+
+#define SAVE_DESKTOP_SETTINGS(x) \
+    saved_struct_save(           \
+        DESKTOP_SETTINGS_PATH,   \
+        (x),                     \
+        sizeof(DesktopSettings), \
+        DESKTOP_SETTINGS_MAGIC,  \
+        DESKTOP_SETTINGS_VER)
+
+#define LOAD_DESKTOP_SETTINGS(x) \
+    saved_struct_load(           \
+        DESKTOP_SETTINGS_PATH,   \
+        (x),                     \
+        sizeof(DesktopSettings), \
+        DESKTOP_SETTINGS_MAGIC,  \
+        DESKTOP_SETTINGS_VER)
+
+#define MAX_PIN_SIZE 10
+#define MIN_PIN_SIZE 4
+
+typedef struct {
+    InputKey data[MAX_PIN_SIZE];
+    uint8_t length;
+} PinCode;
+
+typedef struct {
+    uint16_t favorite_primary;
+    uint16_t favorite_secondary;
+    PinCode pin_code;
+    uint8_t is_locked;
+    uint32_t auto_lock_delay_ms;
+} DesktopSettings;