Implemented I2C scanner app (#97)

Tactility/Source/app/i2cscanner/I2cHelpers.cpp

@@ -0,0 +1,34 @@
+#include "I2cHelpers.h"
+#include "Tactility.h"
+#include "StringUtils.h"
+#include <iomanip>
+#include <vector>
+
+namespace tt::app::i2cscanner {
+
+std::string getAddressText(uint8_t address) {
+    std::stringstream stream;
+    stream << "0x"
+           << std::uppercase << std::setfill ('0')
+           << std::setw(2) << std::hex << (uint32_t)address;
+    return stream.str();
+}
+
+
+std::string getPortNamesForDropdown() {
+    std::vector<std::string> config_names;
+    size_t port_index = 0;
+    for (const auto& i2c_config: tt::getConfiguration()->hardware->i2c) {
+        if (!i2c_config.name.empty()) {
+            config_names.push_back(i2c_config.name);
+        } else {
+            std::stringstream stream;
+            stream << "Port " << std::to_string(port_index);
+            config_names.push_back(stream.str());
+        }
+        port_index++;
+    }
+    return string_join(config_names, "\n");
+}
+
+}