Add embed plugin to example (codex-team#491)

* Add embed plugin to example

* Remove .git

Author: gohabereg

.gitmodules

@@ -28,3 +28,6 @@
 [submodule "example/tools/image"]
 	path = example/tools/image
 	url = https://github.com/codex-editor/image
+[submodule "example/tools/embed"]
+	path = example/tools/embed
+	url = https://github.com/codex-editor/embed

example/example.html

@@ -47,6 +47,7 @@
   <script src="./tools/list/dist/bundle.js"></script><!-- List -->
   <script src="./tools/quote/dist/bundle.js"></script><!-- Quote -->
   <script src="./tools/code/dist/bundle.js"></script><!-- Code -->
+  <script src="./tools/embed/dist/bundle.js"></script><!-- Embed -->
 
   <script src="./tools/marker/dist/bundle.js"></script><!-- Marker -->
   <script src="./tools/inline-code/dist/bundle.js"></script><!-- Inline Code -->
@@ -127,6 +128,8 @@
           class: InlineCode,
           shortcut: 'CMD+SHIFT+C'
         },
+
+        embed: Embed,
       },
 
       /**