HAL renaming & relocation (#215)

Implemented more consistent naming:
- Moved all HAL devices into their own namespace (and related folder)
- Post-fixed all HAL device names with "Device"

Boards/UnPhone/Source/hal/UnPhonePower.h

@@ -1,11 +1,11 @@
 #pragma once
 
-#include <Tactility/hal/Power.h>
+#include "Tactility/hal/power/PowerDevice.h"
 #include <memory>
 
-using namespace tt::hal;
+using tt::hal::power::PowerDevice;
 
-class UnPhonePower : public Power {
+class UnPhonePower : public PowerDevice {
 
 public:
 
@@ -16,7 +16,7 @@ public:
     std::string getDescription() const final { return "Power interface via XPT2046 voltage measurement"; }
 
     bool supportsMetric(MetricType type) const override;
-    bool getMetric(Power::MetricType type, Power::MetricData& data) override;
+    bool getMetric(MetricType type, MetricData& data) override;
 
 private:
 
@@ -24,4 +24,4 @@ private:
     bool readBatteryVoltageSampled(uint32_t& output) const;
 };
 
-std::shared_ptr<Power> unPhoneGetPower();
+std::shared_ptr<PowerDevice> unPhoneGetPower();