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)

Tactility/Source/settings/SystemSettings.cpp

@@ -7,11 +7,11 @@
 namespace tt::settings {
 
 constexpr auto* TAG = "SystemSettings";
-constexpr auto* FILE_PATH = "/data/system.properties";
+constexpr auto* FILE_PATH = "/data/settings/system.properties";
 
 static Mutex mutex = Mutex();
 static bool cached = false;
-static SystemSettings cachedProperties;
+static SystemSettings cachedSettings;
 
 static bool loadSystemSettingsFromFile(SystemSettings& properties) {
     std::map<std::string, std::string> map;
@@ -44,13 +44,13 @@ bool loadSystemSettings(SystemSettings& properties) {
     scoped_lock.lock();
 
     if (!cached) {
-        if (!loadSystemSettingsFromFile(cachedProperties)) {
+        if (!loadSystemSettingsFromFile(cachedSettings)) {
             return false;
         }
         cached = true;
     }
 
-    properties = cachedProperties;
+    properties = cachedSettings;
     return true;
 }
 
@@ -68,7 +68,7 @@ bool saveSystemSettings(const SystemSettings& properties) {
             return false;
         }
 
-        cachedProperties = properties;
+        cachedSettings = properties;
         cached = true;
         return true;
     });