refactor: svg icons (#1096)

* refactor svg

* add svgo

* refine

* add tree.svg

* add svg.yml

src/icons/svg/excel.svg

@@ -1 +1 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg t="1503994842272" class="icon" style="" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="10097" xmlns:xlink="http://www.w3.org/1999/xlink" width="64" height="64"><defs><style type="text/css"></style></defs><path d="M625.664 132.608V199.68h309.76v43.008h-309.76V312.32h309.76v43.008h-309.76v68.608h309.76v43.008h-309.76v68.608h309.76v43.008h-309.76v68.608h309.76v43.008h-309.76v68.096h309.76v43.008h-309.76v89.088H1024v-757.76h-398.336zM0 914.944L577.024 1024V0L0 109.056" p-id="10098"></path><path d="M229.376 660.48H139.776l118.272-187.904-112.64-180.736h92.16l65.536 119.808L370.688 291.84h89.088l-112.64 177.664L466.944 660.48H373.248l-70.144-125.44L229.376 660.48z" p-id="10099"></path></svg>
+<svg width="128" height="128" xmlns="http://www.w3.org/2000/svg"><g><path d="M78.208 16.576v8.384h38.72v5.376h-38.72v8.704h38.72v5.376h-38.72v8.576h38.72v5.376h-38.72v8.576h38.72v5.376h-38.72v8.576h38.72v5.376h-38.72v8.512h38.72v5.376h-38.72v11.136H128v-94.72H78.208zM0 114.368L72.128 128V0L0 13.632v100.736z"/><path d="M28.672 82.56h-11.2l14.784-23.488-14.08-22.592h11.52l8.192 14.976 8.448-14.976h11.136l-14.08 22.208L58.368 82.56H46.656l-8.768-15.68z"/></g></svg>