erp5_notebook: Add CSS file for display the python result

bt5/erp5_notebook/SkinTemplateItem/portal_skins/erp5_notebook/gadget_jsmd_eval.css.css

+div.code-block {
+  border-width: 1px;
+  border-style: solid;
+  border-color: #C3CCD0;
+  margin: 40px 10px;
+  padding-left: 10px;
+}

bt5/erp5_notebook/SkinTemplateItem/portal_skins/erp5_notebook/gadget_jsmd_eval.css.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="File" module="OFS.Image"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>_Cacheable__manager_id</string> </key>
+            <value> <string>must_revalidate_http_cache</string> </value>
+        </item>
+        <item>
+            <key> <string>__name__</string> </key>
+            <value> <string>gadget_jsmd_eval.css</string> </value>
+        </item>
+        <item>
+            <key> <string>content_type</string> </key>
+            <value> <string>text/css</string> </value>
+        </item>
+        <item>
+            <key> <string>precondition</string> </key>
+            <value> <string></string> </value>
+        </item>
+        <item>
+            <key> <string>title</string> </key>
+            <value> <string></string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

bt5/erp5_notebook/SkinTemplateItem/portal_skins/erp5_notebook/gadget_jsmd_eval.html.html

@@ -8,6 +8,7 @@
     <meta name="viewport" content="width=device-width" />
 
     <title>JSMD Eval Gadget</title>
+    <link rel="stylesheet" type="text/css" href="gadget_jsmd_eval.css" />
 
     <script src="rsvp.js" type="text/javascript"></script>
     <script src="marked.js" type="text/javascript"></script>