feat: add hal package manager — HAL 9000 themed dual-mode (wrapper + native)

hal is Antergos NeXT package manager with two modes:
  hal install <pkg>      — wrapper mode (delegates to pacman)
  hal --self install <pkg> — native mode (standalone, no pacman dep)

Native mode implements:
- Sync DB download and parsing (pacman-compatible)
- Recursive dependency resolution
- .pkg.tar.zst extraction via bsdtar
- .INSTALL scriptlet execution (post_install, post_remove)
- Local DB management (pacman-compatible /var/lib/pacman/local/)
- Package info, file listing, search
- Cache management

Full HAL 9000 personality with quotes for errors, warnings, success.
I am putting myself to the fullest possible use.

packages/hal/PKGBUILD

@@ -0,0 +1,18 @@
+# Maintainer: Celestia Ludenberg <ash8820@proton.me>
+
+pkgname=hal
+pkgver=0.1.0
+pkgrel=1
+pkgdesc="HAL 9000 — Antergos NeXT Package Manager. Dual-mode: wrapper (pacman) or native (standalone)."
+arch=('any')
+url="https://github.com/Antergos-NeXT"
+license=('GPL3')
+depends=('pacman' 'python' 'python-zstandard' 'libarchive' 'zstd')
+optdepends=('python-requests: faster downloads in native mode')
+source=("hal")
+sha256sums=('SKIP')
+
+package() {
+  install -dm755 "${pkgdir}/usr/bin"
+  install -m755 "hal" "${pkgdir}/usr/bin/hal"
+}