[brand] initial - folder src/brand for searxng-wordmark

Folder src/brand is intended to place logo, wordmark and more in.  This commit
moves the origin (source) of searxng-wordmark.svg from the simple theme into
this folder

About the new created src/ folder:

On the long term we can move all the files from static/themes/<name>/src/* into
a src/themes/<name>/* folder.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/simple/gruntfile.js

@@ -102,7 +102,7 @@ module.exports = function(grunt) {
           svgo: ['--config', 'svg4web.svgo.js']
         },
         files: {
-          '../../../templates/__common__/searxng-wordmark.min.svg': 'src/svg/searxng-wordmark.svg'
+          '../../../templates/__common__/searxng-wordmark.min.svg': '../../../../src/brand/searxng-wordmark.svg'
         }
       }
     },

searx/static/themes/simple/src/svg/searxng-wordmark.svg

@@ -1,56 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   id="svg8"
-   version="1.1"
-   viewBox="0 0 92 92"
-   height="92mm"
-   width="92mm">
-  <defs
-     id="defs2" />
-  <metadata
-     id="metadata5">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     transform="translate(-40.921303,-17.416526)"
-     id="layer1">
-    <circle
-       r="0"
-       style="fill:none;stroke:#000000;stroke-width:12;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
-       cy="92"
-       cx="75"
-       id="path3713" />
-    <circle
-       r="30"
-       cy="53.902557"
-       cx="75.921303"
-       id="path834"
-       style="fill:none;fill-opacity:1;stroke:#3050ff;stroke-width:10;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
-    <path
-       d="m 67.514849,37.91524 a 18,18 0 0 1 21.051475,3.312407 18,18 0 0 1 3.137312,21.078282"
-       id="path852"
-       style="fill:none;fill-opacity:1;stroke:#3050ff;stroke-width:5;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
-    <rect
-       transform="rotate(-46.234709)"
-       ry="1.8669105e-13"
-       y="122.08995"
-       x="3.7063529"
-       height="39.963303"
-       width="18.846331"
-       id="rect912"
-       style="opacity:1;fill:#3050ff;fill-opacity:1;stroke:none;stroke-width:8;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
-  </g>
-</svg>