Add ability to edit forms and add new fields

This commit adds the ability to edit and modify existing forms.
On the technical side, it also adds a new reusable validation Facade which helps reduce duplicated code.

public/js/formbuilder.js

@@ -1,3 +1,4 @@
+// TODO: Add cleaner and less verbose solution found in formeditor.js
 $(document).ready(function() {
     $("#add").click(function() {
         var lastField = $("#buildyourform div:last");

public/js/formeditor.js

@@ -0,0 +1,19 @@
+// reminder: use vuejs instead, this is still an ugly and cheap solution
+$(document).ready(function(){
+
+  var fieldID = 0;
+  var wrapper = $('.field-container');
+  var newBtn = $('#add');
+
+  $(newBtn).click(function(e){
+    e.preventDefault()
+    fieldID++;
+
+    $(wrapper).append('<div id=group' + fieldID + '><input type="text" name="newFieldID' + fieldID + '[]" class="form-control" />');
+    $(wrapper).append('<select name="newFieldID' + fieldID + '[]" class="custom-select"> <option value="nil" disabled>Choose a type</option> <option value="textbox">Textbox</option> <option value="textarea">Multi line answer</option> <option value="checkbox">Checkbox</option> </select>');
+    //$(wrapper).append('<button type="button" class="btn btn-danger btn-sm float-right delete"><i class="fas fa-minus"></i></button></div>');
+
+
+  });
+
+});