Improve Paper UI, allow an to entity configure how it's UI looks (#13494)

Co-authored-by: Eoin Mcloughlin <helloworld@eoinrul.es>

Resources/Textures/Interface/Paper/paper_background_book.svg

@@ -0,0 +1,143 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   width="38"
+   height="32"
+   viewBox="0 0 38 31.999999"
+   fill="none"
+   version="1.1"
+   id="svg4"
+   sodipodi:docname="paper_background_book.svg"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
+   inkscape:export-filename="paper_background_book.svg.96dpi.png"
+   inkscape:export-xdpi="96"
+   inkscape:export-ydpi="96"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:dc="http://purl.org/dc/elements/1.1/">
+  <metadata
+     id="metadata10">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs8">
+    <inkscape:path-effect
+       effect="powerclip"
+       id="path-effect1116"
+       is_visible="true"
+       lpeversion="1"
+       inverse="true"
+       flatten="false"
+       hide_clip="false"
+       message="Use fill-rule evenodd on &lt;b&gt;fill and stroke&lt;/b&gt; dialog if no flatten result after convert clip to paths." />
+    <linearGradient
+       inkscape:collect="always"
+       id="linearGradient997">
+      <stop
+         style="stop-color:#999999;stop-opacity:1;"
+         offset="0"
+         id="stop993" />
+      <stop
+         style="stop-color:#999999;stop-opacity:0;"
+         offset="1"
+         id="stop995" />
+    </linearGradient>
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient997"
+       id="linearGradient999"
+       x1="0"
+       y1="15.75"
+       x2="31"
+       y2="15.75"
+       gradientUnits="userSpaceOnUse"
+       gradientTransform="translate(0,-4.75)" />
+  </defs>
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1916"
+     inkscape:window-height="1034"
+     id="namedview6"
+     showgrid="true"
+     inkscape:snap-bbox="true"
+     inkscape:bbox-paths="false"
+     inkscape:bbox-nodes="true"
+     inkscape:snap-object-midpoints="false"
+     inkscape:snap-nodes="false"
+     inkscape:snap-page="true"
+     inkscape:zoom="11.313708"
+     inkscape:cx="3.0052038"
+     inkscape:cy="12.860505"
+     inkscape:window-x="0"
+     inkscape:window-y="44"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg4"
+     inkscape:showpageshadow="2"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid453"
+       originx="0"
+       originy="0" />
+  </sodipodi:namedview>
+  <rect
+     style="opacity:1;fill:#808080;fill-opacity:1;stroke-width:2.17427;stroke-linejoin:round"
+     id="rect296"
+     width="38"
+     height="32"
+     x="0"
+     y="0"
+     ry="13.270285" />
+  <rect
+     style="fill:#44525a;fill-opacity:1;stroke-width:2.17427;stroke-linejoin:round"
+     id="rect350"
+     width="16"
+     height="32"
+     x="0"
+     y="0"
+     ry="0" />
+  <rect
+     style="opacity:1;fill:#000000;fill-opacity:0.322916;stroke-width:2.17427;stroke-linejoin:round"
+     id="rect1038"
+     width="37"
+     height="14"
+     x="-4"
+     y="10"
+     ry="4"
+     clip-path="none" />
+  <rect
+     style="opacity:1;fill:#e3dbdb;fill-opacity:1;stroke-width:2.17427;stroke-linejoin:round"
+     id="rect346"
+     width="36"
+     height="14"
+     x="-5"
+     y="9"
+     ry="4.25" />
+  <rect
+     style="opacity:1;fill:url(#linearGradient999);fill-opacity:1;stroke-width:2.17427;stroke-linejoin:round"
+     id="rect377"
+     width="31"
+     height="14"
+     x="0"
+     y="9"
+     ry="0" />
+</svg>