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)

Drivers/EstimatedPower/Source/EstimatedPower.cpp

@@ -0,0 +1,30 @@
+#include "EstimatedPower.h"
+
+bool EstimatedPower::supportsMetric(MetricType type) const {
+    switch (type) {
+        using enum MetricType;
+        case BatteryVoltage:
+        case ChargeLevel:
+            return true;
+        default:
+            return false;
+    }
+}
+
+bool EstimatedPower::getMetric(MetricType type, MetricData& data) {
+    switch (type) {
+        using enum MetricType;
+        case BatteryVoltage:
+            return chargeFromAdcVoltage->readBatteryVoltageSampled(data.valueAsUint32);
+        case ChargeLevel:
+            if (chargeFromAdcVoltage->readBatteryVoltageSampled(data.valueAsUint32)) {
+                data.valueAsUint32 = chargeFromAdcVoltage->estimateChargeLevelFromVoltage(data.valueAsUint32);
+                return true;
+            } else {
+                return false;
+            }
+        default:
+            return false;
+    }
+}
+