Road to 0.6.0

- readd the c++ linear allocator for 3ds
- start switching from PD::Vec to std::vector
- Add Color::Hex as constexpr for compiletime color converts
- Add FNV Hasing functions
- Make UI7 ids be able to be generated at compile time
- Added a Throw Function (for whatever)
- Added HexCHar2Int (replaces the lookup table)
- Made u128 fully constexpr

pd/lithium/source/drawlist.cpp

@@ -37,6 +37,8 @@ PD_LITHIUM_API void DrawList::Clear() {
   pNumIndices = 0;
   pNumVertices = 0;
   pDrawList.clear();
+  pPath.Clear();
+  pClipRects.Clear();
 }
 
 PD_LITHIUM_API void DrawList::AddCommand(Command::Ref v) {