feat: create version.cmd for windows support (elizaOS#2442)

* Create version.cmd

Initial Error Investigation
   - Encountered build error in client package
   - Error indicated `version.sh` script couldn't be executed on Windows.

Windows Script Compatibility Fix
   - Examined original `version.sh` shell script functionality
   - Created equivalent `version.cmd` batch script for Windows
   - Updated script to use Windows-compatible commands:

* Update client/version.cmd

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

---------

Co-authored-by: Sayo <hi@sayo.wtf>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

client/version.cmd

@@ -0,0 +1,25 @@
+@echo off
+setlocal enabledelayedexpansion
+
+set "LERNA_FILE=..\lerna.json"
+
+if not exist "%LERNA_FILE%" (
+    echo Error: %LERNA_FILE% does not exist.
+    exit /b 1
+)
+
+for /f "tokens=2 delims=:, " %%a in ('findstr "version" "%LERNA_FILE%"') do (
+    set "VERSION=%%~a"
+)
+
+if "!VERSION!"=="" (
+    echo Error: Unable to extract version from %LERNA_FILE%.
+    exit /b 1
+)
+
+if not exist "src\" mkdir src
+echo { "version": !VERSION! } > src\info.json
+if errorlevel 1 (
+    echo Error: Failed to write src\info.json
+    exit /b 1
+)