[Clang] Add the list of core papers approved in Varna to the status page

clang/www/cxx_status.html

@@ -101,10 +101,55 @@ <h2 id="cxx26">C++2c implementation status</h2>
     <th>C++26 Proposal</th>
     <th>Available in Clang?</th>
  </tr>
+ <!-- Spring 2023 papers (Varna) -->
+ <tr>
+  <td>Remove undefined behavior from lexing</td>
+  <td><a href="https://wg21.link/P2621R2">P2621R2</a> (<a href="#dr">DR</a>)</td>
+  <td class="full" align="center">Clang 3.3</td>
+ </tr>
+ <tr>
+  <td>Making non-encodable string literals ill-formed</td>
+  <td><a href="https://wg21.link/P1854R4">P1854R4</a> (<a href="#dr">DR</a>)</td>
+  <td class="full" align="center">Clang 14</td>
+ </tr>
+ <tr>
+  <td>Unevaluated strings</td>
+  <td><a href="https://wg21.link/P2361R6">P2361R6</a></td>
+  <td class="none" align="center">No</td>
+ </tr>
+ <tr>
+  <td>Add @, $, and ` to the basic character set</td>
+  <td><a href="https://wg21.link/P2558R2">P2558R2</a></td>
+  <td class="full" align="center">Yes</td>
+ </tr>
+ <tr>
+  <td>constexpr cast from <tt>void*</tt></td>
+  <td><a href="https://wg21.link/P2738R1">P2738R1</a></td>
+  <td class="none" align="center">No</td>
+ </tr>
+ <tr>
+  <td>On the ignorability of standard attributes</td>
+  <td><a href="https://wg21.link/P2552R3">P2552R3</a> (<a href="#dr">DR</a>)</td>
+  <td class="none" align="center">No</td>
+ </tr>
+ <tr>
+  <td>Static storage for braced initializers</td>
+  <td><a href="https://wg21.link/P2752R3">P2752R3</a> (<a href="#dr">DR</a>)</td>
+  <td class="none" align="center">No</td>
+ </tr>
+ <tr>
+  <td>User-generated <tt>static_assert</tt> messages</td>
+  <td><a href="https://wg21.link/P2741R3">P2741R3</a></td>
+  <td class="none" align="center">No</td>
+ </tr>
+ <tr>
+  <td>Placeholder variables with no name</td>
+  <td><a href="https://wg21.link/P2169R4">P2169R4</a></td>
+  <td class="none" align="center">No</td>
+ </tr>
 </table>
 </details>
 
-
 <h2 id="cxx23">C++23 implementation status</h2>
 
 <!-- TODO add link to the ISO Standard after it's published. -->