Fix warning: maybe-uninitialized

../../components/misc/color.cpp: In static member function 'static Misc::Color Misc::Color::fromHex(std::string_view)':
../../components/misc/color.cpp:36:24: error: 'v' may be used uninitialized in this function [-Werror=maybe-uninitialized]
   36 |             rgb[i] = v / 255.0f;
      |                      ~~^~~~~~~~

components/misc/color.cpp

@@ -29,7 +29,7 @@ namespace Misc
         for (size_t i = 0; i < rgb.size(); i++)
         {
             auto sub = hex.substr(i * 2, 2);
-            int v;
+            int v = 0;
             auto [_, ec] = std::from_chars(sub.data(), sub.data() + sub.size(), v, 16);
             if (ec != std::errc())
                 throw std::logic_error(std::string("Invalid hex color: ") += hex);