load font CBM on runtime

you can load the font on runtime:

at end of FormC64.pas:

```
var
  fontname: string;

initialization
  fontname := '..\ROMs\CBM.ttf';

  AddFontResource(PChar(fontname));
  SendMessage(HWND_BROADCAST, WM_FONTCHANGE, 0, 0);

finalization
  RemoveFontResource(PChar(fontname));
  SendMessage(HWND_BROADCAST, WM_FONTCHANGE, 0, 0);
end.
```

