feat(plugins/sponsors): add new sponsors plugin (#548)

source/templates/classic/style.css

@@ -931,11 +931,26 @@
     margin-right: 0;
   }
 
-/* Introduction */
-  .introduction {
+/* Introduction and sponsors */
+  .introduction, .sponsors {
     white-space: normal;
     margin: 0 13px 2px;
   }
+  .sponsors.goal {
+    padding: 6px 8px;
+    border-radius: 5px;
+    background-color: #7777771F;
+  }
+  .sponsors .goal-text {
+    display: flex;
+    justify-content: space-between;
+    font-style: italic;
+    font-size: 10px;
+    margin-bottom: 4px;
+  }
+  .sponsors .avatar {
+    margin: 2px;
+  }
 
 /* Stackoverflow */
   .stackoverflow {
@@ -1137,6 +1152,22 @@
     display: inline-block;
     width: 97%;
   }
+  .markdown p {
+    margin: 8px 0;
+  }
+  .markdown ul {
+    padding-left: 24px;
+  }
+  .markdown a {
+    color: #58a6ff;
+    text-decoration: none;
+  }
+  .markdown blockquote {
+    border-left: 4px solid #7777771F;
+    color: #777777;
+    margin: 0;
+    padding-left: 16px;
+  }
   code {
     background-color: #7777771F;
     display: inline-block;