Added the release notes MD file and corresponding node entry in the TOC.html file

Author: DeepakRajSundar

winui-toc.html

@@ -692,7 +692,7 @@
 <li>2025 Volume 3 - v31.*
 <ul>
 <li> Weekly Nuget Release 
-<ul><li><a href="/winui/release-notes/v31.2.10">v31.2.10</a></li><li><a href="/winui/release-notes/v31.2.5">v31.2.5</a></li><li><a href="/winui/release-notes/v31.2.4">v31.2.4</a></li>
+<ul><li><a href="/winui/release-notes/v31.2.15">v31.2.15</a></li><li><a href="/winui/release-notes/v31.2.10">v31.2.10</a></li><li><a href="/winui/release-notes/v31.2.5">v31.2.5</a></li><li><a href="/winui/release-notes/v31.2.4">v31.2.4</a></li>
 <li><a href="/winui/release-notes/v31.2.3">v31.2.3</a></li>
 <li><a href="/winui/release-notes/v31.1.23">v31.1.23</a></li>
 <li><a href="/winui/release-notes/v31.1.22">v31.1.22</a></li>

winui/Release-notes/v31.2.15.md

@@ -0,0 +1,46 @@
+---
+title: Essential Studio® for WinUI Release Notes - v31.2.15
+description: Learn here about the controls in the Essential Studio® for WinUI Weekly Nuget Release - Release Notes - v31.2.15
+platform: winui
+documentation: ug
+---
+
+# Essential Studio® for WinUI - v31.2.15 Release Notes
+
+{% include release-info.html date="November 25, 2025" version="v31.2.15" passed="7714" failed="0" %}
+
+{% directory path: _includes/release-notes/v31.2.15 %}
+
+{% include {{file.url}} %}
+
+{% enddirectory %}
+
+## Test Results
+
+| Component Name | Test Cases | Passed | Failed | Remarks |
+|---------------|------------|--------|--------|---------|
+| SfAutoComplete | 30 | 30 | 0 | All Passed |
+| SfAvatarView | 260 | 260 | 0 | All Passed |
+| SfBadge | 187 | 187 | 0 | All Passed |
+| SfBarCode | 291 | 291 | 0 | All Passed |
+| SfCalendar | 114 | 114 | 0 | All Passed |
+| SfCalendarDatePicker | 130 | 130 | 0 | All Passed |
+| SfCalendarDateRangePicker | 174 | 174 | 0 | All Passed |
+| SfCartesianChart | 966 | 966 | 0 | All Passed |
+| SfChart | 86 | 86 | 0 | All Passed |
+| SfColorPalette | 53 | 53 | 0 | All Passed |
+| SfCombobox | 100 | 100 | 0 | All Passed |
+| SfDataGrid | 622 | 622 | 0 | All Passed |
+| SfDatePicker | 82 | 82 | 0 | All Passed |
+| SfKanban | 1335 | 1335 | 0 | All Passed |
+| SfLinearGauge | 1184 | 1184 | 0 | All Passed |
+| SfPolarChart | 88 | 88 | 0 | All Passed |
+| SfRadialGauge | 397 | 397 | 0 | All Passed |
+| SfRangeSlider | 149 | 149 | 0 | All Passed |
+| SfRating | 45 | 45 | 0 | All Passed |
+| SfRibbon | 20 | 20 | 0 | All Passed |
+| SfScheduler | 1099 | 1099 | 0 | All Passed |
+| SfSegmented | 50 | 50 | 0 | All Passed |
+| SfShadow | 41 | 41 | 0 | All Passed |
+| SfSlider | 139 | 139 | 0 | All Passed |
+| SfTimePicker | 72 | 72 | 0 | All Passed |