[Feature] Ketcher V3 (#427)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#427

static/js/ketcher2/node_modules/gulp-svgicons2svgfont/tests/fixtures/prefixedicons/u0011-arrow-down.svg

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   version="1.1"
-   width="150"
-   height="150"
-   viewBox="0 0 150 150"
-   id="svg2">
-  <path
-     d="M 75,120 120,70 30,70 z"
-     id="path2986" />
-</svg>

static/js/ketcher2/node_modules/gulp-svgicons2svgfont/tests/fixtures/prefixedicons/u0012-arrow-up.svg

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   version="1.1"
-   width="150"
-   height="150"
-   viewBox="0 0 150 150"
-   id="svg2">
-  <path
-     d="m 75,70 45,50 -90,0 z"
-     id="path2986" />
-</svg>

static/js/ketcher2/node_modules/gulp-svgicons2svgfont/tests/fixtures/prefixedicons/u0013u0014-arrow-right.svg

@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-  xmlns:svg="http://www.w3.org/2000/svg"
-  xmlns="http://www.w3.org/2000/svg"
-  version="1.1"
-  x="0px"
-  y="0px"
-  width="150"
-  height="150"
-  viewBox="0 0 150 150"
-  id="svg2">
-  <path
-    id="path2986"
-    d="M 100,75 50,30 50,120 z" />
-</svg>

static/js/ketcher2/node_modules/gulp-svgicons2svgfont/tests/fixtures/prefixedicons/u0015,u0016,uA011uA012-arrow-left.svg

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   version="1.1"
-   width="150"
-   height="150"
-   viewBox="0 0 150 150"
-   id="svg2">
-  <path
-    d="M 50,75 100,30 100,120 z"
-    id="path2986" />
-</svg>