Merge develop into main (#348)

## App state

Improved app state management in `LoaderService` and `GuiService`:

- Re-ordered some of the state transitions
- Hardened `GuiService` for repeated events (that might trigger a re-render of an app that's already rendered)
- Validate state transitions in `LoaderService` and crash if an app transitions from the wrong state to the next one.

## LoaderService

- Removed `tt::loader::` functions and expose `LoaderService` interface publicly.
- Implement `stopAll()` and `stopAll(id)` which stops all instances of an app, including any apps that were launched by it.
- Rename `stop()` functions to `stopTop()`
- Created `stopTop(id)` which only stops the top-most app when the app id matches.
- Moved `loader::LoaderEvent` to `loader::LoaderService::Event`
- Changed app instance `std::stack` to `std::vector`

## Improvements

- `ElfApp`: error 22 now shows a hint that `main()` might be missing
- Starting, installing and uninstalling apps now stops any running app (and its children) on the stack

## Bugfixes

- `HttpdReq` out of memory issue now shows an error message and doesn't crash anymore (this would happen on devices without PSRAM with WiFi active, when an app was installed)
- `GuiService::hideApp()` lock should not wait for timeout and now waits indefinitely
- `Buildscript/release-sdk-current.sh` deletes the previous local release before building a new one

## Code correctness

- App classes were made `final`
- Apps that had a `void start()` now have a `LaunchId start()`
- `tt::app::State`: renamed `Started` to `Created` and `Stopped` to `Destroyed` to properly reflect earlier name changes

Tactility/Source/app/imageviewer/ImageViewer.cpp

@@ -1,7 +1,6 @@
-#include "Tactility/lvgl/Style.h"
-#include "Tactility/lvgl/Toolbar.h"
-#include "Tactility/service/loader/Loader.h"
-
+#include <Tactility/lvgl/Style.h>
+#include <Tactility/lvgl/Toolbar.h>
+#include <Tactility/service/loader/Loader.h>
 #include <Tactility/TactilityCore.h>
 #include <Tactility/StringUtils.h>
 
@@ -11,10 +10,10 @@ namespace tt::app::imageviewer {
 
 extern const AppManifest manifest;
 
-#define TAG "image_viewer"
-#define IMAGE_VIEWER_FILE_ARGUMENT "file"
+constexpr auto* TAG = "ImageViewer";
+constexpr auto* IMAGE_VIEWER_FILE_ARGUMENT = "file";
 
-class ImageViewerApp : public App {
+class ImageViewerApp final : public App {
 
     void onShow(AppContext& app, lv_obj_t* parent) override {
         auto wrapper = lv_obj_create(parent);
@@ -67,10 +66,10 @@ extern const AppManifest manifest = {
     .createApp = create<ImageViewerApp>
 };
 
-void start(const std::string& file) {
+LaunchId start(const std::string& file) {
     auto parameters = std::make_shared<Bundle>();
     parameters->putString(IMAGE_VIEWER_FILE_ARGUMENT, file);
-    service::loader::startApp(manifest.appId, parameters);
+    return app::start(manifest.appId, parameters);
 }
 
 } // namespace