feat: uclaude_updater — automatic client updater

- uclaude_updater.py — auto-detect version, install cli.js, patch settings
- uclaude_update.sh/bat/ps1 — platform wrappers (git pull + run updater)
- patcher.config.json — shared API config
- Updated README with full usage instructions

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

uclaude_update.bat

@@ -0,0 +1,18 @@
+@echo off
+REM UClaude Updater — automatic Claude Code patch updater
+REM Usage: uclaude_update.bat [--check] [--force] [--settings-only]
+
+setlocal enabledelayedexpansion
+set "SCRIPT_DIR=%~dp0"
+cd /d "%SCRIPT_DIR%"
+
+REM Pull latest artifacts
+git pull --quiet 2>nul
+
+REM Run updater
+python uclaude_updater.py %*
+if errorlevel 1 (
+    echo.
+    echo If you see permission errors, run this script as Administrator.
+    pause
+)