Add hex utility functions and refactor usage in editors

src/util/hex.h

@@ -0,0 +1,20 @@
+#ifndef YAZE_UTIL_HEX_H
+#define YAZE_UTIL_HEX_H
+
+#include <cstdint>
+
+namespace yaze {
+namespace util {
+
+struct HexStringParams {
+  enum class Prefix { kNone, kDollar, kHash, k0x } prefix = Prefix::kDollar;
+  bool uppercase = true;
+};
+
+std::string HexByte(uint8_t byte, HexStringParams params = {});
+std::string HexWord(uint16_t word, HexStringParams params = {});
+std::string HexLong(uint32_t dword, HexStringParams params = {});
+std::string HexLongLong(uint64_t qword, HexStringParams params = {});
+
+}  // namespace util
+}  // namespace yaze