Merge Develop into Main (#300)

- Made an external app from internal Calculator app
- Update tactility.py to v1.2.0 (fix bug with selfupdate)
- Added warning to Development service UI
- Add context to `SECURITY.md`
- Split `ObjectFileReader` and `ObjectFileWriter` into separate cpp files
- Fix related to GPS config read errors

ExternalApps/Calculator/main/Source/main.cpp

@@ -0,0 +1,30 @@
+#include <tt_app.h>
+#include "Calculator.h"
+
+static void onShow(AppHandle appHandle, void* data, lv_obj_t* parent) {
+    static_cast<Calculator*>(data)->onShow(appHandle, parent);
+}
+
+static void* createApp() {
+    return new Calculator();
+}
+
+static void destroyApp(void* app) {
+    delete static_cast<Calculator*>(app);
+}
+
+ExternalAppManifest manifest = {
+    .name = "Hello World",
+    .createData = createApp,
+    .destroyData = destroyApp,
+    .onShow = onShow,
+};
+
+extern "C" {
+
+int main(int argc, char* argv[]) {
+    tt_app_register(&manifest);
+    return 0;
+}
+
+}