Refactor app access (#205)

- Use `tt::app::` functions to start/stop apps and get current app(context) instead of using loader everywhere
- Removed `tt_service_loader.*` from TactilityC
- Created `tt_app_stop()` for TactilityC
- Bumped version to 0.3.0 to prepare for upcoming release

TactilityC/Source/tt_app.cpp

@@ -27,4 +27,8 @@ void tt_app_start_with_bundle(const char* appId, BundleHandle parameters) {
     tt::app::start(appId, std::shared_ptr<tt::Bundle>((tt::Bundle*)parameters));
 }
 
+void tt_app_stop() {
+    tt::app::stop();
+}
+
 }

TactilityC/Source/tt_service_loader.cpp

@@ -1,20 +0,0 @@
-#include "tt_service_loader.h"
-#include <Tactility/Bundle.h>
-#include <Tactility/service/loader/Loader.h>
-
-extern "C" {
-
-void tt_service_loader_start_app(const char* id, BundleHandle _Nullable bundle) {
-    auto shared_bundle = std::shared_ptr<tt::Bundle>((tt::Bundle*)bundle);
-    tt::service::loader::startApp(id, std::move(shared_bundle));
-}
-
-void tt_service_loader_stop_app() {
-    tt::service::loader::stopApp();
-}
-
-AppHandle tt_service_loader_get_current_app() {
-    return tt::service::loader::getCurrentAppContext().get();
-}
-
-}