Rename ReactPlayground to Playground

src/components/Playground/CodeEditor/Editor/editor.scss

@@ -0,0 +1,43 @@
+.monaco-editor-light {
+  height: 100%;
+  overflow: hidden;
+  background-color: var(--border);
+
+  .jsx-tag-angle-bracket {
+    color: #800000;
+  }
+
+  .jsx-text {
+    color: #000;
+  }
+
+  .jsx-tag-name {
+    color: #800000;
+  }
+
+  .jsx-tag-attribute-key {
+    color: #f00;
+  }
+}
+
+.monaco-editor-vs-dark {
+  height: 100%;
+  overflow: hidden;
+  background-color: var(--border);
+
+  .jsx-tag-angle-bracket {
+    color: #808080;
+  }
+
+  .jsx-text {
+    color: #d4d4d4;
+  }
+
+  .jsx-tag-name {
+    color: #569cd6;
+  }
+
+  .jsx-tag-attribute-key {
+    color: #9cdcfe;
+  }
+}