Remove TactilityC and Firmware subprojects (#638)

- Removed TactilityC, moved its symbols to existing modules and several new ones (pthread-module, c-symbols-module, cpp-symbols-module, posix-symbols-module, freertos-module).
- Removed Firmware subproject and moved main() into Tactility subproject.
- Strengthened application archive, path, version, stack-size, and device validation.
- Moved symbol resolution for elf_loader to app-esp32-module.
- Improved `struct Module` declarations and made module and symbol definitions in modules more consistent.
- Removed old http download code from Tactility subproject.
- Rename app-module's source files for consistency.
- Add missing pthread symbols.
- Kernel module symbols are now resolvable on all platforms.

Modules/lvgl-module/source/module.c

@@ -67,5 +67,5 @@ struct Module lvgl_module = {
     .start = start,
     .stop = stop,
     .symbols = (const struct ModuleSymbol*)lvgl_module_symbols,
-    .internal = NULL
+    .internal = NULL,
 };

Modules/lvgl-module/source/symbols.c

@@ -531,5 +531,5 @@ const struct ModuleSymbol lvgl_module_symbols[] = {
     // lv_area
     DEFINE_MODULE_SYMBOL(lv_area_get_width),
     DEFINE_MODULE_SYMBOL(lv_area_get_height),
-    MODULE_SYMBOL_TERMINATOR
-};
+    MODULE_SYMBOL_TERMINATOR,
+};