Implemented I2C scanner app (#97)

Tactility/Source/app/i2cscanner/I2cScanner.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <TactilityCore.h>
+#include <Mutex.h>
+#include <Thread.h>
+#include "lvgl.h"
+#include "hal/i2c/I2c.h"
+
+namespace tt::app::i2cscanner {
+
+#define TAG "i2cscanner"
+
+enum ScanState {
+    ScanStateInitial,
+    ScanStateScanning,
+    ScanStateStopped
+};
+
+struct Data {
+    // Core
+    Mutex mutex = Mutex(MutexTypeRecursive);
+    Thread* _Nullable scanThread = nullptr;
+    // State
+    ScanState scanState;
+    i2c_port_t port = I2C_NUM_0;
+    std::vector<uint8_t> scannedAddresses;
+    // Widgets
+    lv_obj_t* scanButtonLabelWidget = nullptr;
+    lv_obj_t* portDropdownWidget = nullptr;
+    lv_obj_t* scanListWidget = nullptr;
+};
+
+void onThreadFinished(Data* data);
+
+}