refactor: Move core aios packages to build.zsh

Moved essential aios components to build.zsh (base layer):
- sudoers configuration (wheel group permissions)
- aigpt install (aios core package)
- aibot install (aios core package) - renamed from 'ai' to 'aibot'

Updated module responsibilities:
- build.zsh: Arch base + aios core packages (required)
- setup-user.sh: User customization only
- setup-claude.sh: Claude MCP configuration only

Benefits:
- Clear separation: base vs customization
- aigpt/aibot always included (core aios functionality)
- Modules can be optionally skipped for customization

build.zsh

@@ -60,6 +60,18 @@ arch-chroot root.x86_64/var/lib/machines/arch /bin/sh -c 'npm i -g @anthropic-ai
 # Copy os-release
 cp -rf ./cfg/os-release root.x86_64/var/lib/machines/arch/etc/os-release
 
+# Configure sudoers for wheel group
+echo "Configuring sudoers..."
+arch-chroot root.x86_64/var/lib/machines/arch /bin/sh -c 'echo "%wheel ALL=(ALL:ALL) NOPASSWD: /usr/bin/pacman -Syu --noconfirm, /usr/bin/rm -rf /var/lib/pacman/db.lck, /usr/bin/poweroff, /usr/bin/reboot, /usr/bin/machinectl" >> /etc/sudoers'
+
+# Install aigpt (aios core package)
+echo "Installing aigpt..."
+arch-chroot root.x86_64/var/lib/machines/arch /bin/sh -c 'git clone https://git.syui.ai/ai/gpt && cd gpt && cargo build --release && cp -rf ./target/release/aigpt /bin/'
+
+# Install aibot (aios core package)
+echo "Installing aibot..."
+arch-chroot root.x86_64/var/lib/machines/arch /bin/sh -c 'git clone https://git.syui.ai/ai/bot && cd bot && cargo build && cp -rf ./target/debug/aibot /bin/ && aibot ai'
+
 echo "✓ Arch Linux base complete"
 echo ""