chore: changelog for #2513

Author: vmaerten

CHANGELOG.md

@@ -12,6 +12,8 @@
   @vmaerten).
 - Improved shell completion scripts (Zsh, Fish, PowerShell) by adding missing
   flags and dynamic experimental feature detection (#2532 by @vmaerten).
+- Added LLM-optimized documentation via VitePress plugin, generating `llms.txt`
+  and `llms-full.txt` for AI-powered development tools (#2513 by @vmaerten).
 
 ## v3.45.5 - 2025-11-11