[Docs] Update src links and move charts to Docs (#4821)

Summary:Addressing pathing issues resulting from the directory restructure in #4816.Key Changes:Guides: rawgithub links $\rightarrow$ local relative src paths.Structure: Moved charts/ $\rightarrow$ Docs/charts/ to simplify path referencing.Fixes: Corrected broken paths caused by the Docs folder isolation.

wrote a toggle script for large svg images in guide-zhCN.

Author: zealot-zew

charts/DotsChart.svg Docs/charts/DotsChart.svgcharts/DotsChart.svg renamed to Docs/charts/DotsChart.svg

@@ -50,7 +50,7 @@ foi feita no Chrome.</p>
 <p>Quando você inicia o Music Blocks no seu navegador, você verá uma pilha
 de blocos representando quatro notas: <code>Do 4</code>, <code>Mi 4</code>, <code>Sol 4</code> e <code>Do 5</code>. A primeira nota é uma <code>1/2</code> nota; a segunda e terceira notas são
 <code>1/4</code> de notas; a quarta nota é uma <code>1/1</code>.</p>
-<p><a target="_blank" rel="noopener noreferrer" href="https://camo.githubusercontent.com/88e05b3afe36679b491a0941624f66746502f6e7/68747470733a2f2f7261776769746875622e636f6d2f73756761726c6162732f6d75736963626c6f636b732f6d61737465722f6865616465722d69636f6e732f706c61792d627574746f6e2e737667"><img src="https://camo.githubusercontent.com/88e05b3afe36679b491a0941624f66746502f6e7/68747470733a2f2f7261776769746875622e636f6d2f73756761726c6162732f6d75736963626c6f636b732f6d61737465722f6865616465722d69636f6e732f706c61792d627574746f6e2e737667" alt="alt tag" title="play button" data-canonical-src="https://rawgithub.com/sugarlabs/musicblocks/master/header-icons/play-button.svg" style="max-width:100%;"></a></p>
+<p><a target="_blank" rel="noopener noreferrer" href="https://camo.githubusercontent.com/88e05b3afe36679b491a0941624f66746502f6e7/68747470733a2f2f7261776769746875622e636f6d2f73756761726c6162732f6d75736963626c6f636b732f6d61737465722f6865616465722d69636f6e732f706c61792d627574746f6e2e737667"><img src="https://camo.githubusercontent.com/88e05b3afe36679b491a0941624f66746502f6e7/68747470733a2f2f7261776769746875622e636f6d2f73756761726c6162732f6d75736963626c6f636b732f6d61737465722f6865616465722d69636f6e732f706c61792d627574746f6e2e737667" alt="alt tag" title="play button" data-canonical-src="../../header-icons/play-button.svg" style="max-width:100%;"></a></p>
 <p>Tente clicar no bloco <em>Iniciar</em> ou clique no botão <em>Executar</em>. Você deve ouvir essas notas tocarem sucessivamente: <code>Do</code> <code>Mi</code> <code>Sol</code> <code>Do</code>.</p>
 <p>Para escrever seus próprios programas, arraste blocos de suas respectivas paletas
 no lado esquerdo da tela. Use vários blocos na(s) pilha(s) para