feat: add Nemo file manager emblems for git repo status

emblems/emblem-repo-git.svg

@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48">
+  <circle cx="24" cy="24" r="21" fill="#3f5a7d" stroke="#1e2f42" stroke-width="1.5"/>
+  <g fill="none" stroke="#e8edf3" stroke-width="3" stroke-linecap="round">
+    <circle cx="17" cy="15" r="3.2" fill="#e8edf3" stroke="none"/>
+    <circle cx="17" cy="33" r="3.2" fill="#e8edf3" stroke="none"/>
+    <circle cx="31" cy="24" r="3.2" fill="#e8edf3" stroke="none"/>
+    <path d="M17 18 L17 30"/>
+    <path d="M17 24 Q17 24 24 24 Q28 24 31 21"/>
+  </g>
+</svg>