Fix update package: consolidate versions 0.292-0.294 into ver. 0.292

- Move ZIP to updates/0.20/ver_0.292.zip (correct location)
- Add ver_0.292_files.txt (12 deleted shop classes)
- Consolidate changelog entries (0.292+0.293+0.294 → single 0.292)
- Set versions.php $current_ver = 292

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

updates/versions.php

@@ -1,5 +1,5 @@
 <?
-$current_ver = 294;
+$current_ver = 292;
 
 for ($i = 1; $i <= $current_ver; $i++)
 {