Use teal on all icons, update README

static/assets/img/icon/icon.svg

@@ -5,11 +5,11 @@
    viewBox="0 0 6 6"
    version="1.1"
    id="svg4"
-   sodipodi:docname="favicon.svg"
-   inkscape:export-filename="favicon.png"
-   inkscape:export-xdpi="96"
-   inkscape:export-ydpi="96"
-   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
+   sodipodi:docname="icon.svg"
+   inkscape:export-filename="icon_260.png"
+   inkscape:export-xdpi="195"
+   inkscape:export-ydpi="195"
+   inkscape:version="1.3.2 (091e20ef0f, 2023-11-25)"
    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
    xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
    xmlns="http://www.w3.org/2000/svg"
@@ -27,16 +27,16 @@
      inkscape:deskcolor="#d1d1d1"
      showgrid="false"
      inkscape:zoom="1.8780367"
-     inkscape:cx="56.44192"
-     inkscape:cy="47.922385"
-     inkscape:window-width="1366"
-     inkscape:window-height="741"
+     inkscape:cx="56.708157"
+     inkscape:cy="47.656151"
+     inkscape:window-width="1430"
+     inkscape:window-height="846"
      inkscape:window-x="0"
      inkscape:window-y="0"
-     inkscape:window-maximized="1"
+     inkscape:window-maximized="0"
      inkscape:current-layer="svg4" />
   <circle
-     style="fill:#483737;fill-rule:evenodd;stroke-width:0.046875"
+     style="fill:#00a5a5;fill-rule:evenodd;stroke-width:0.046875;fill-opacity:1"
      id="path897"
      cx="3"
      cy="3"