[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/main/archive/helpers/archive_apps.c

@@ -0,0 +1,84 @@
+#include "archive_files.h"
+#include "archive_apps.h"
+#include "archive_browser.h"
+
+static const char* known_apps[] = {
+    [ArchiveAppTypeU2f] = "u2f",
+};
+
+ArchiveAppTypeEnum archive_get_app_type(const char* path) {
+    const char* app_name = strchr(path, ':');
+    if(app_name == NULL) {
+        return ArchiveAppTypeUnknown;
+    }
+    app_name++;
+
+    for(size_t i = 0; i < COUNT_OF(known_apps); i++) {
+        if(strncmp(app_name, known_apps[i], strlen(known_apps[i])) == 0) {
+            return i;
+        }
+    }
+    return ArchiveAppTypeUnknown;
+}
+
+bool archive_app_is_available(void* context, const char* path) {
+    UNUSED(context);
+    furi_assert(path);
+
+    ArchiveAppTypeEnum app = archive_get_app_type(path);
+
+    if(app == ArchiveAppTypeU2f) {
+        bool file_exists = false;
+        Storage* storage = furi_record_open(RECORD_STORAGE);
+
+        if(storage_file_exists(storage, ANY_PATH("u2f/key.u2f"))) {
+            file_exists = storage_file_exists(storage, ANY_PATH("u2f/cnt.u2f"));
+        }
+
+        furi_record_close(RECORD_STORAGE);
+        return file_exists;
+    } else {
+        return false;
+    }
+}
+
+bool archive_app_read_dir(void* context, const char* path) {
+    furi_assert(context);
+    furi_assert(path);
+    ArchiveBrowserView* browser = context;
+
+    archive_file_array_rm_all(browser);
+
+    ArchiveAppTypeEnum app = archive_get_app_type(path);
+
+    if(app == ArchiveAppTypeU2f) {
+        archive_add_app_item(browser, "/app:u2f/U2F Token");
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void archive_app_delete_file(void* context, const char* path) {
+    furi_assert(context);
+    furi_assert(path);
+    ArchiveBrowserView* browser = context;
+
+    ArchiveAppTypeEnum app = archive_get_app_type(path);
+    bool res = false;
+
+    if(app == ArchiveAppTypeU2f) {
+        Storage* fs_api = furi_record_open(RECORD_STORAGE);
+        res = (storage_common_remove(fs_api, ANY_PATH("u2f/key.u2f")) == FSE_OK);
+        res |= (storage_common_remove(fs_api, ANY_PATH("u2f/cnt.u2f")) == FSE_OK);
+        furi_record_close(RECORD_STORAGE);
+
+        if(archive_is_favorite("/app:u2f/U2F Token")) {
+            archive_favorites_delete("/app:u2f/U2F Token");
+        }
+    }
+
+    if(res) {
+        archive_file_array_rm_selected(browser);
+    }
+}