Mystify Demo, TwoEleven updates & Snake (#21)

* **New Features**
  * Added Mystify screensaver demo with animated polygons and trails
  * Added Snake game with multiple difficulties, high-score persistence, and multi-input (touch/keyboard) support
  * Added CLI tool for building, packaging, and deploying apps (end-to-end build/install/run workflow)
  * Per-grid-size high-score persistence added to 2048 app; expanded keyboard controls (WASD and device-specific mappings)

* **Documentation**
  * Added Snake README with gameplay, controls, and usage instructions

Apps/MystifyDemo/main/CMakeLists.txt

@@ -0,0 +1,9 @@
+file(GLOB_RECURSE SOURCE_FILES Source/*.c*)
+
+idf_component_register(
+    SRC_DIRS "Source"
+    # Library headers must be included directly,
+    # because all regular dependencies get stripped by elf_loader's cmake script
+    INCLUDE_DIRS "Include" "../../../Libraries/TactilityCpp/Include"
+    REQUIRES TactilitySDK
+)