refactor: svg icons (#1096)

* refactor svg

* add svgo

* refine

* add tree.svg

* add svg.yml

src/icons/svg/theme.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="1517304322151" class="icon" style="" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="6548" xmlns:xlink="http://www.w3.org/1999/xlink" width="64" height="64"><defs><style type="text/css"></style></defs><path d="M1004.094293 321.092267L762.737493 79.735467a68.266667 68.266667 0 0 0-96.546133 0l-30.293333 30.293333a68.283733 68.283733 0 0 1-48.264534 20.002133h-151.1936a68.181333 68.181333 0 0 1-48.264533-20.002133l-30.293333-30.293333a68.266667 68.266667 0 0 0-96.546134 0L19.962027 321.092267a68.266667 68.266667 0 0 0 0 96.546133l96.546133 96.546133a67.84 67.84 0 0 0 66.645333 17.271467c10.8032-3.072 21.674667 4.181333 21.674667 15.4112V896c0 37.546667 30.72 68.266667 68.266667 68.266667h477.866666c37.546667 0 68.266667-30.72 68.266667-68.266667V546.8672c0-11.229867 10.871467-18.4832 21.674667-15.4112a67.84 67.84 0 0 0 66.645333-17.271467l96.546133-96.546133a68.266667 68.266667 0 0 0 0-96.546133z" p-id="6549"></path></svg>
+<svg width="128" height="128" xmlns="http://www.w3.org/2000/svg"><path d="M125.5 36.984L95.336 2.83C93.735 1.018 91.565 0 89.3 0c-2.263 0-4.433 1.018-6.033 2.83l-3.786 4.286c-1.6 1.812-3.77 2.83-6.032 2.831H54.553c-2.263 0-4.434-1.018-6.033-2.83L44.734 2.83C43.134 1.018 40.964 0 38.701 0c-2.263 0-4.434 1.018-6.034 2.83L2.5 36.984C.9 38.796 0 41.254 0 43.815c0 2.562.899 5.02 2.5 6.831L14.565 64.31c2.178 2.468 5.367 3.403 8.33 2.444 1.35-.435 2.709.592 2.709 2.18v49.407c0 5.313 3.84 9.66 8.532 9.66h59.726c4.693 0 8.532-4.347 8.532-9.66V68.934c0-1.59 1.36-2.616 2.71-2.181 2.962.96 6.15.024 8.329-2.444L125.5 50.646c1.6-1.811 2.499-4.269 2.499-6.83 0-2.563-.899-5.02-2.5-6.832z"/></svg>