Initial setup: mac_os installer with custom config

Contains both components needed for Mac setup:
- mac_os/: Installer scripts (from bkuhlmann/mac_os)
- mac_os-config/: Custom app configuration

Configured apps:
- Homebrew formulas: atuin, bash, ffmpeg, mas, mole, node, rename, ykman
- Homebrew casks: chromium, deepl, element, nextcloud, nova, proton suite, signal, transmit
- App Store: Affinity suite, Bitwarden, Final Cut Pro, Invoice Ninja, iWork, PastePal, xSearch

Usage: cd mac_os && ./bin/run

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

mac_os-config/bin/install_basics

@@ -0,0 +1,39 @@
+#! /usr/bin/env bash
+
+# Installs basic system settings.
+
+read -p "What is this machine's label (Example: \"Alchemist\")? " mac_os_label
+if [[ -z "$mac_os_label" ]]; then
+  printf "%s\n" "ERROR: Invalid MacOS label."
+  exit 1
+fi
+
+read -p "What is this machine's name (Example: \"alchemist\")? " mac_os_name
+if [[ -z "$mac_os_name" ]]; then
+  printf "%s\n" "ERROR: Invalid MacOS name."
+  exit 1
+fi
+
+read -p "Delete all files in $HOME/Documents (y/n)? " documents
+if [[ "$documents" == "y" ]]; then
+  rm -rf "$HOME/Documents/*"
+  printf "%s\n" "Documents deleted."
+fi
+
+read -p "Delete all files in $HOME/Downloads (y/n)? " downloads
+if [[ "$downloads" == "y" ]]; then
+  rm -rf "$HOME/Downloads/*"
+  printf "%s\n" "Downloads deleted."
+fi
+
+read -p "Change /usr/local ownership to $USER:staff (y/n)? " ownership
+if [[ "$ownership" == "y" ]]; then
+  sudo chown -R "$USER":staff /usr/local
+  printf "%s\n" "Ownership changed."
+fi
+
+printf "Setting system label and name...\n"
+sudo scutil --set ComputerName "$mac_os_label"
+sudo scutil --set HostName "$mac_os_name"
+sudo scutil --set LocalHostName "$mac_os_name"
+sudo defaults write /Library/Preferences/SystemConfiguration/com.apple.smb.server NetBIOSName -string $mac_os_name