refactor: перенос файлов в claude/ + мульти-продуктовая структура

- Все claude-файлы перенесены в claude/ (uclaude_updater.py, скрипты, config)
- claude/README.md с инструкцией для Claude Code
- Корневой README — общий для всех продуктов (claude, codex, gemini, qwen, antigravity)
- Node.js v24.13+ автоустановка через nodesource
- Sparse checkout: клиент скачивает только latest версию cli.js

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

claude/README.md

@@ -0,0 +1,61 @@
+# Claude Code — Patched CLI
+
+Patched Claude Code CLI for use with custom API endpoints. 15 patches applied.
+
+## Requirements
+
+- Node.js v24.13+ ([nodejs.org](https://nodejs.org/)) — updater will auto-install if missing or outdated
+- Python 3
+- Git
+
+## Install
+
+```bash
+# Install Claude Code
+npm install -g @anthropic-ai/claude-code
+
+# One-line install (from repo root):
+sudo bash claude/uclaude_update.sh --force
+```
+
+## Update
+
+```bash
+sudo bash claude/uclaude_update.sh
+```
+
+## Options
+
+```bash
+sudo bash claude/uclaude_update.sh --check          # check for updates
+sudo bash claude/uclaude_update.sh --force           # force reinstall
+sudo bash claude/uclaude_update.sh --settings-only   # only patch settings
+```
+
+## Windows
+
+```cmd
+claude\uclaude_update.bat
+```
+
+## What's Patched
+
+- Custom API endpoint (base URL, auth token)
+- Custom model picker (configurable model list)
+- Auth/OAuth bypass for custom endpoints
+- Telemetry disabled (Datadog, Segment)
+- Permission prompts auto-accepted
+- Root/sudo check removed
+
+## Files
+
+| File | Purpose |
+|------|---------|
+| `uclaude_updater.py` | Main updater — version check, cli.js install, settings patch |
+| `uclaude_update.sh` | Linux/macOS wrapper |
+| `uclaude_update.bat` | Windows CMD wrapper |
+| `uclaude_update.ps1` | Windows PowerShell wrapper |
+| `uclaude_install.sh` | One-line installer (curl-friendly) |
+| `patcher.config.json` | API endpoint config (base_url, api_key, models) |
+| `releases/index.json` | Version index |
+| `releases/v*/cli.js` | Patched cli.js per version |