Add warning tool (#653)

* Add warning tool

* Add warning tool

* Use latest list

.gitmodules

@@ -43,3 +43,6 @@
 [submodule "example/tools/raw"]
 	path = example/tools/raw
 	url = https://github.com/editor-js/raw
+[submodule "example/tools/warning"]
+	path = example/tools/warning
+	url = https://github.com/editor-js/warning

example/assets/json-preview.js

@@ -31,7 +31,7 @@ const cPreview = (function (module) {
     /** Stylize JSON keys */
     string = string.replace( /"(\w+)"\s?:/g, '"<span class=sc_key>$1</span>" :');
     /** Stylize tool names */
-    string = string.replace( /"(paragraph|quote|list|header|link|code|image|delimiter|raw|checklist|table|embed)"/g, '"<span class=sc_toolname>$1</span>"');
+    string = string.replace( /"(paragraph|quote|list|header|link|code|image|delimiter|raw|checklist|table|embed|warning)"/g, '"<span class=sc_toolname>$1</span>"');
     /** Stylize HTML tags */
     string = string.replace( /(&lt;[\/a-z]+(&gt;)?)/gi, '<span class=sc_tag>$1</span>' );
     /** Stylize strings */

example/example.html

@@ -55,7 +55,8 @@
   <script src="./tools/embed/dist/bundle.js"></script><!-- Embed -->
   <script src="./tools/table/dist/bundle.js"></script><!-- Table -->
   <script src="./tools/link/dist/bundle.js"></script><!-- Link -->
-  <script src="./tools/raw/dist/bundle.js"></script><!-- Link -->
+  <script src="./tools/raw/dist/bundle.js"></script><!-- Raw -->
+  <script src="./tools/warning/dist/bundle.js"></script><!-- Warning -->
 
   <script src="./tools/marker/dist/bundle.js"></script><!-- Marker -->
   <script src="./tools/inline-code/dist/bundle.js"></script><!-- Inline Code -->
@@ -125,6 +126,8 @@
           shortcut: 'CMD+SHIFT+O'
         },
 
+        warning: Warning,
+
         marker: {
           class:  Marker,
           shortcut: 'CMD+SHIFT+M'