added form validator code snippet (#1675)

Author: Rajat32-op

Client-Side Components/Client Scripts/Field Completion Counter/README.md

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+# Field Completion Counter
+
+## Use Case / Requirement
+Display a simple message showing how many fields are completed vs total fields on a form. This helps users track their progress while filling out forms.
+
+## Solution
+A simple onLoad client script that:
+- Counts filled vs empty fields
+- Shows completion status in an info message
+- Updates when fields are modified
+
+## Implementation
+Add this as an **onLoad** client script on any form.
+
+## Notes
+- Excludes system fields and read-only fields
+- Updates in real-time as users fill fields
+- Simple and lightweight solution

Client-Side Components/Client Scripts/Field Completion Counter/script.js

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+function onLoad() {
+    // Display field completion counter
+    showFieldProgress();
+    
+    // Set up listener for field changes
+    setupProgressUpdater();
+    
+    function showFieldProgress() {
+        var allFields = g_form.getFieldNames();
+        var visibleFields = [];
+        var filledFields = 0;
+        
+        // Count visible, editable fields
+        for (var i = 0; i < allFields.length; i++) {
+            var fieldName = allFields[i];
+            
+            // Skip system fields and hidden/readonly fields
+            if (fieldName.indexOf('sys_') === 0 || 
+                !g_form.isVisible(fieldName) || 
+                g_form.isReadOnly(fieldName)) {
+                continue;
+            }
+            visibleFields.push(fieldName);
+            
+            // Check if field has value
+            if (g_form.getValue(fieldName)) {
+                filledFields++;
+            }
+        }
+        var totalFields = visibleFields.length;
+        var percentage = totalFields > 0 ? Math.round((filledFields / totalFields) * 100) : 0;
+        
+        g_form.addInfoMessage('Form Progress: ' + filledFields + '/' + totalFields + ' fields completed (' + percentage + '%)');
+    }
+    
+    function setupProgressUpdater() {
+        // Simple debounced update
+        var updateTimer;
+        
+        function updateProgress() {
+            clearTimeout(updateTimer);
+            updateTimer = setTimeout(function() {
+                g_form.clearMessages();
+                showFieldProgress();
+            }, 500);
+        }
+        
+        // Listen for any field change
+        var allFields = g_form.getFieldNames();
+        for (var i = 0; i < allFields.length; i++) {
+            g_form.addElementChangeListener(allFields[i], updateProgress);
+        }
+    }
+}