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)

TactilityCore/Include/Tactility/Dispatcher.h

@@ -19,7 +19,8 @@ namespace tt {
  * Generally, one task would dispatch the execution,
  * while the other thread consumes and executes the work.
  */
-class Dispatcher {
+class Dispatcher final {
+
 public:
 
     typedef std::function<void()> Function;
@@ -38,8 +39,10 @@ public:
     /**
      * Queue a function to be consumed elsewhere.
      * @param[in] function the function to execute elsewhere
+     * @param[in] timeout lock acquisition timeout
+     * @return true if dispatching was successful (timeout not reached)
      */
-    void dispatch(Function function, TickType_t timeout = portMAX_DELAY);
+    bool dispatch(Function function, TickType_t timeout = portMAX_DELAY);
 
     /**
      * Consume 1 or more dispatched function (if any) until the queue is empty.