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/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.20)
+
+include("${CMAKE_CURRENT_LIST_DIR}/../../Buildscripts/module.cmake")
+
+file(GLOB_RECURSE SOURCE_FILES "source/*.c*")
+
+tactility_add_module(app-posix-module
+    SRCS ${SOURCE_FILES}
+    INCLUDE_DIRS include/
+    REQUIRES TactilityKernel app-module service-module
+    PRIV_REQUIRES ${CMAKE_DL_LIBS}
+)
+
+# Baked in at compile time, mirroring ESP32's CONFIG_IDF_TARGET - names the installed-app binary
+# (e.g. "elf/posix-x86_64.so") this Tactility process's own architecture can dlopen(), letting one
+# .app package bundle a variant per posix architecture, same as one .app bundles a .elf per chip.
+target_compile_definitions(app-posix-module PRIVATE "TACTILITY_POSIX_ARCH=\"${CMAKE_SYSTEM_PROCESSOR}\"")