Implement posix app loading (#643)

- Added POSIX desktop support for SDK builds, application packaging, and integration testing.
- Added POSIX filesystem partitions and improved application path handling.
- Added simulator support for loading and running applications dynamically.
- Improved simulator task stack handling and display startup reliability.
- Improved simulator display scaling, resizing, high-DPI support, and pointer accuracy.
- Fixed LVGL timers and input polling on POSIX. (fixes simulator with Linux on some Intel graphics platforms)
- Standardized data paths across platforms.
- Logging now works via separate task: this allows apps to write to log without it affecting their stdout (for apps that output text as relevant date for other apps, like the File Selection app)
- Fixes for app stdio

Modules/app-posix-module/source/module.cpp

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: Apache-2.0
+#include <app_posix/module.h>
+
+#include <service/manager.h>
+
+#include <tactility/error.h>
+#include <tactility/module.h>
+
+extern "C" {
+
+extern ServiceManifest loader_service_manifest;
+
+static error_t start() {
+    return service_manager_add(&loader_service_manifest, /*auto_start=*/true);
+}
+
+static error_t stop() {
+    return service_manager_remove(loader_service_manifest.id);
+}
+
+Module app_posix_module = {
+    .name = "app-posix",
+    .start = start,
+    .stop = stop,
+    .drivers = nullptr,
+    .symbols = nullptr,
+    .internal = nullptr,
+};
+
+}