Add: Web JSON portal type

bt5/erp5_web/PortalTypeTemplateItem/portal_types/Web%20JSON.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="JSON Type" module="erp5.portal_type"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>content_icon</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>description</string> </key>
+            <value> <string>Storage for Data Notebooks</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>Web JSON</string> </value>
+        </item>
+        <item>
+            <key> <string>init_script</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>permission</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>portal_type</string> </key>
+            <value> <string>JSON Type</string> </value>
+        </item>
+        <item>
+            <key> <string>type_class</string> </key>
+            <value> <string>TextDocument</string> </value>
+        </item>
+        <item>
+            <key> <string>type_interface</string> </key>
+            <value>
+              <tuple/>
+            </value>
+        </item>
+        <item>
+            <key> <string>type_mixin</string> </key>
+            <value>
+              <tuple/>
+            </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

bt5/erp5_web/bt/template_portal_type_id_list

 Static Web Section
+Web JSON
 Web Page
 Web Page Module
 Web Section