feat : add piece sets (#9)

public/piece/kosal/wK.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 81 81"><style>.st1{fill:#fff}.st2{fill:#cfcecf}</style><path d="M0 0h81v81H0z" style="fill:none"/><path d="M58 25.9c-6 0-9.1 2.6-10.6 4.1l-7 12.2-7-12.2C32 28.5 29 25.9 23 25.9c-9.4 0-14.9 7.7-14.9 15.3 0 8.6 3.7 11.5 8.6 21.7V71h47.6v-8.1c4.9-10.1 8.6-13.1 8.6-21.7 0-7.6-5.5-15.3-14.9-15.3z" class="st1"/><path d="m35.3 32.8 5.2 10.7 5.2-10.7-3.1-11 7.9 2.4v-7.6l-7.9 1 1.7-7.3h-7.6l1.7 7.3-7.9-1v7.6l7.9-2.4z" class="st1"/><path d="M64.7 27.4C71.8 40 58 58.6 45.9 59.9l19.4 2.6 6.6-13.4 1-9.9-1.7-5.2-2.6-3.6-3.9-3zm-31.1 2.7c1.1 5.4-1.6 14.6-5.4 20.5S17.7 61.4 17.7 61.4l22.8-1.6V42.6l-6.9-12.5z" class="st2"/><path d="M53.1 60.6v9.9H64v-7.6zm-3.6-42.9-1.3 2.8-7.1-.2 8.4 3.3h1zm-6.4-6.4L40.5 13v6.2l1.6-1zm-1.3 10.2v11.7l-1.3 7L45 34zm-1.9-.9h-9.4v3.6z" class="st2"/><path d="m36.4 51.2 4.1 6 4.1-6-4.1-6z"/><path d="M69.8 29.9c-3-3.4-7.2-5.2-11.8-5.2-4.8 0-8.6 1.5-11.5 4.5l-.5.8-1.9-6.7 7.4 2.2V15.4l-7.6 1 1.7-7.1H35.4l1.7 7.1-7.6-1v10.1l7.4-2.2-1.9 6.8-.4-.7-.1-.2v-.1c-2.9-3-6.7-4.5-11.5-4.5-10.1 0-16.1 8.4-16.1 16.6 0 6.4 2 10 4.8 14.9l.6 1c1 1.7 2.1 3.7 3.2 6v9.1h50.1v-9.1c1.2-2.3 2.2-4.3 3.2-6l.6-1c2.8-4.9 4.8-8.5 4.8-14.9 0-4.1-1.6-8.2-4.4-11.3zm-29.9-9.6-8.4 2.5v-5.1l8.2 1-1.8-7.4h5.2l-1.8 7.4 8.2-1v5.1l-8.4-2.5 3.5 12.2-4.1 7.2-4.1-7.2 3.5-12.2zM63 69.8H17.8v-6.5C21.6 62.6 31 61 40.5 61c9.3 0 18.6 1.5 22.5 2.2v6.6zm4.2-14.9c-1 1.6-3 4.7-3.8 5.9-4.1-.7-13.4-2.2-23-2.2-9.7 0-19.2 1.5-23.1 2.2-.8-1.2-2.8-4.2-3.7-5.9l-.1-.1C10.8 50 9.1 47 9.1 41.3c0-9.1 7-14 13.6-14 4 0 7.2 1.2 9.6 3.6l8 13.9 8-13.9c2.4-2.4 5.6-3.6 9.6-3.6 8.9 0 13.7 7.2 13.7 14 .1 5.7-1.6 8.7-4.4 13.6z"/></svg>