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>

bin/install_homebrew_formulas

@@ -0,0 +1,34 @@
+#! /usr/bin/env bash
+
+# Installs Homebrew formulas (CLI tools).
+
+set -o nounset
+set -o errexit
+set -o pipefail
+IFS=$'\n\t'
+
+# Ensure Homebrew is installed
+install_homebrew
+
+# Shell & Terminal
+brew install atuin
+brew install bash
+brew install bash-completion
+
+# AI
+brew install claude-cli
+brew install gemini-cli
+
+# Development
+brew install node
+
+# Media
+brew install ffmpeg
+
+# Utilities
+brew install mas
+brew install mole
+brew install rename
+brew install ykman
+
+printf "\n✅ Homebrew Formulas installation complete!\n"