Add SimpleGlideAggregate utility with usage examples

Introduced SimpleGlideAggregate utility to simplify and enhance GlideAggregate usage in ServiceNow. Provides a chainable API for common aggregation operations and includes sample usage.

Author: Charanjet

Server-Side Components/Script Includes/SimpleGlideAggregate/Readme.md

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+SimpleGlideAggregate Utility
+**Overview**
+SimpleGlideAggregate is a developer utility Script Include for ServiceNow that provides a simplified, chainable API around the native GlideAggregate class. It abstracts complexities of writing aggregation queries and returns results in an easy-to-use JavaScript object format.
+Because OOTB glideAggregate API is little bit different so I tried to create a new function with a simper version.
+**Purpose**
+Simplify aggregate queries such as COUNT, SUM, MIN, and MAX for developers, especially those less familiar with GlideAggregate methods.
+Provide an intuitive interface for common aggregation operations with chaining support.
+Facilitate viewing aggregate results alongside individual records matching the same criteria for better analysis.
+
+**Sample Usage of the functions :**
+ var sga = new SimpleGlideAggregate('incident');
+
+        // Build query and add all supported aggregates
+        var results = sga
+            .addQuery('active', true)             // Filter: active incidents only
+            .addQuery('priority', '>=', 2)        // Priority 2 or higher
+            .count()                             // Count matching records
+            .sum('duration')                    // Sum of duration field instead of impact
+            .min('priority')                     // Minimum priority value in results
+            .max('sys_updated_on')               // Most recent update timestamp
+            .execute();
+
+        gs.info('Aggregate Results:');
+        gs.info('Count: ' + results.COUNT);
+        gs.info('Sum of Duration: ' + (results.SUM_duration !== undefined ? results.SUM_duration : 'N/A'));
+        gs.info('Minimum Priority: ' + (results.MIN_priority !== undefined ? results.MIN_priority : 'N/A'));
+        gs.info('Most Recent Update (max sys_updated_on timestamp): ' + (results.MAX_sys_updated_on !== undefined ? results.MAX_sys_updated_on : 'N/A'));
+
+        // Optionally fetch some matching record details to complement the aggregate data
+        var gr = new GlideRecord('incident');
+        gr.addQuery('active', true);
+        gr.addQuery('priority', '>=', 2);
+        gr.orderByDesc('sys_updated_on');
+        gr.setLimit(5);
+        gr.query();
+
+        gs.info('Sample Matching Incidents:');
+        while (gr.next()) {
+            gs.info('Number: ' + gr.getValue('number') + ', Priority: ' + gr.getValue('priority') + ', Updated: ' + gr.getValue('sys_updated_on'));
+        }