Flatten directory structure and update documentation

- Moved all files from mac_os/ subdirectory to repository root
- Updated README.adoc to reflect simplified architecture
- Updated QUICK_INSTALL.md with all current apps
- Added claude-cli to install.sh and bin/install_homebrew_formulas
- Repository now shows clean file structure without nested mac_os folder
- Documentation now accurately describes opinionated installer approach

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

QUICK_INSTALL.md

@@ -0,0 +1,85 @@
+# Quick Install Guide
+
+## One-Line Install (Recommended)
+
+Upload `install.sh` to `static.due.ren`, then on a fresh Mac run:
+
+```bash
+curl -fsSL https://static.due.ren/install.sh | bash
+```
+
+That's it! The script will:
+1. Install Xcode Command Line Tools
+2. Install Homebrew
+3. Install all CLI tools (atuin, bash, bash-completion, claude-cli, gemini-cli, node, ffmpeg, mas, mole, rename, ykman)
+4. Install all GUI apps (Chromium, DeepL, Element, Signal, Nextcloud, Proton apps, Codex, CodexBar, Nova, Transmit, Trimmy)
+5. Install Mac App Store apps (Bitwarden, Invoice Ninja, Numbers, Pages, PastePal, xSearch)
+6. Download and install Google Fonts (Barlow, Barlow Semi Condensed, Poppins)
+
+## Notes
+
+- **Mac App Store apps**: You must be signed into the App Store before running
+- **Berkeley Mono font**: This is a commercial font ($75) and must be purchased and installed manually from https://berkeleygraphics.com/typefaces/berkeley-mono/
+- **Idempotent**: Safe to run multiple times - won't reinstall existing software
+
+## Manual Installation
+
+If you prefer to review before running:
+
+```bash
+curl -fsSL https://static.due.ren/install.sh -o install.sh
+chmod +x install.sh
+./install.sh
+```
+
+## Hosting the Script
+
+To host on static.due.ren:
+
+1. Upload `install.sh` to your static host
+2. Ensure it's accessible at `https://static.due.ren/install.sh`
+3. Make sure the file is served with correct MIME type (text/plain or application/x-sh)
+
+## What's Installed
+
+### Homebrew Formulas (CLI)
+- atuin - Shell history manager
+- bash - Updated bash shell
+- bash-completion - Bash completions
+- claude-cli - Claude AI CLI
+- gemini-cli - Gemini AI CLI
+- node - Node.js
+- ffmpeg - Media processing
+- mas - Mac App Store CLI
+- mole - SSH tunneling
+- rename - Rename utility
+- ykman - YubiKey manager
+
+### Homebrew Casks (GUI)
+- eloston-chromium - Ungoogled Chromium
+- deepl - DeepL translator
+- element - Matrix client
+- signal - Signal messenger
+- nextcloud - Nextcloud sync
+- proton-drive - Proton Drive
+- proton-mail - Proton Mail
+- protonvpn - Proton VPN
+- codex - AI coding assistant
+- codexbar - AI assistant menu bar (via steipete/tap)
+- nova - Nova editor
+- transmit - FTP client
+- trimmy - Video trimming tool
+
+### Mac App Store
+- Bitwarden - Password manager
+- Invoice Ninja - Invoicing
+- Numbers - Spreadsheets
+- Pages - Word processor
+- PastePal - Clipboard manager
+- xSearch - Search tool
+
+### Fonts
+- Barlow (Google Font) - Full family
+- Barlow Semi Condensed (Google Font) - Full family
+- Poppins (Google Font) - Full family
+- Berkeley Mono (Commercial) - Must install manually