Merge TactilityHeadless into Tactility (#263)

There currently is no practical use to have TactilityHeadless as a subproject. I'm merging it with the Tactility project.

Tactility/Source/service/wifi/WifiSettingsMock.cpp

@@ -0,0 +1,27 @@
+#ifndef ESP_PLATFORM
+
+#include "Tactility/service/wifi/WifiSettings.h"
+
+namespace tt::service::wifi::settings {
+
+#define TAG "wifi_settings_mock"
+
+bool contains(const char* ssid) {
+    return false;
+}
+
+bool load(const char* ssid, WifiApSettings* settings) {
+    return false;
+}
+
+bool save(const WifiApSettings* settings) {
+    return true;
+}
+
+bool remove(const char* ssid) {
+    return true;
+}
+
+} // namespace
+
+#endif // ESP_PLATFORM