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.

.github/actions/build-simulator/action.yml

@@ -45,7 +45,7 @@ runs:
       run: cmake -S ./ -B buildsim
     - name: "Build Tests"
       shell: bash
-      run: cmake --build buildsim --target FirmwareSim
+      run: cmake --build buildsim --target Tactility
     - name: 'Release'
       shell: bash
       run: Buildscripts/release-simulator.sh buildsim release/Simulator-${{ inputs.os_name }}-${{ inputs.platform_name }}