fix: pin menu description to bottom of menu for stable layout

Move the selected item's description from inline (below each item) to a
fixed position at the bottom. Eliminates layout reflow when navigating
between items of different description lengths.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: dotnetprofessional

livedoc2.cmd

@@ -0,0 +1,20 @@
+@echo off
+setlocal EnableExtensions
+
+REM Livedoc2 Launcher
+REM Generated by project-menu skill. Customize freely.
+
+pushd "%~dp0" >nul
+
+REM Prefer pwsh (PowerShell 7+) for better terminal support.
+where pwsh >nul 2>&1
+if %errorlevel% equ 0 (
+    pwsh -NoProfile -ExecutionPolicy Bypass -File "%~dp0livedoc2.ps1" %*
+) else (
+    powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0livedoc2.ps1" %*
+)
+set "exitCode=%errorlevel%"
+
+popd >nul
+endlocal & exit /b %exitCode%
+