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

TactilityKernel/source/paths.cpp

@@ -42,7 +42,6 @@ static error_t paths_get_data_root_path(char* out_path, size_t out_path_size) {
 extern "C" {
 
 error_t paths_get_data_path(char* out_path, size_t out_path_size) {
-#ifdef ESP_PLATFORM
     char root[64];
     error_t error = paths_get_data_root_path(root, sizeof(root));
     if (error != ERROR_NONE) {
@@ -53,14 +52,6 @@ error_t paths_get_data_path(char* out_path, size_t out_path_size) {
         return ERROR_BUFFER_OVERFLOW;
     }
     return ERROR_NONE;
-#else
-    const char* fixed_path = "data";
-    if (std::strlen(fixed_path) + 1 > out_path_size) {
-        return ERROR_BUFFER_OVERFLOW;
-    }
-    std::strcpy(out_path, fixed_path);
-    return ERROR_NONE;
-#endif
 }
 
 } // extern "C"