Merge develop into main (#313)

- Add app path get() functions to `TactilityC`
- Improved `Dispatcher` and `DispatcherThread`
- Improved `PubSub` (type safety)
- Created test for `DispatcherThread` and `PubSub`
- Save properties files on app exit (various apps) by posting it to the main dispatcher (fixes UI hanging briefly on app exit)
- Fixed bug with `SystemSettings` being read from the wrong file path.
- `loadPropertiesFile()` now uses `file::readLines()` instead of doing that manually
- Increased timer task stack size (required due to issues when reading a properties file for the very first time)
- General cleanup
- Created `EstimatedPower` driver that uses an ADC pin to measure voltage and estimate the battery charge that is left.
- Cleanup of T-Deck board (updated to new style)

TactilityC/Source/tt_app.cpp

@@ -4,6 +4,8 @@
 
 extern "C" {
 
+constexpr auto* TAG = "tt_app";
+
 #define HANDLE_AS_APP_CONTEXT(handle) ((tt::app::AppContext*)(handle))
 
 BundleHandle _Nullable tt_app_get_parameters(AppHandle handle) {
@@ -31,4 +33,38 @@ void tt_app_stop() {
     tt::app::stop();
 }
 
+void tt_app_get_data_directory(AppPathsHandle handle, char* buffer, size_t& size) {
+    assert(buffer != nullptr);
+    assert(size > 0);
+    auto paths = HANDLE_AS_APP_CONTEXT(handle)->getPaths();
+    auto data_path = paths->getDataDirectory();
+    auto expected_length = data_path.length() + 1;
+    if (size < expected_length) {
+        TT_LOG_E(TAG, "Path buffer not large enough (%d < %d)", size, expected_length);
+        size = 0;
+        buffer[0] = 0;
+        return;
+    }
+
+    strcpy(buffer, data_path.c_str());
+    size = data_path.length();
+}
+
+void tt_app_get_data_directory_lvgl(AppPathsHandle handle, char* buffer, size_t& size) {
+    assert(buffer != nullptr);
+    assert(size > 0);
+    auto paths = HANDLE_AS_APP_CONTEXT(handle)->getPaths();
+    auto data_path = paths->getDataDirectoryLvgl();
+    auto expected_length = data_path.length() + 1;
+    if (size < expected_length) {
+        TT_LOG_E(TAG, "Path buffer not large enough (%d < %d)", size, expected_length);
+        size = 0;
+        buffer[0] = 0;
+        return;
+    }
+
+    strcpy(buffer, data_path.c_str());
+    size = data_path.length();
+}
+
 }