add necessary files to build with yay or install with pacman

PKGBUILD

@@ -0,0 +1,19 @@
+pkgname=nova-chatmix
+pkgver=0.0.1
+pkgrel=1
+arch=('x86_64')
+depends=('python' 'python-hid' 'pipewire')
+makedepends=('git')
+source=("$pkgname::git+https://github.com/Dymstro/nova-chatmix-linux.git")
+sha256sums=('SKIP')
+install=nova-chatmix.install
+
+package() {
+  cd "$pkgname"
+  install -Dm755 nova.py "$pkgdir/usr/bin/nova-chatmix"
+  install -Dm644 50-nova-pro-wireless.rules \
+       "$pkgdir/usr/lib/udev/rules.d/50-nova-pro-wireless.rules"
+  install -Dm644 nova-chatmix.service \
+       "$pkgdir/usr/lib/systemd/user/nova-chatmix.service"
+  install -Dm644 README.md "$pkgdir/usr/share/doc/$pkgname/README.md"
+}

nova-chatmix.install

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+post_install() {
+  echo "==> To enable nova-chatmix for your user, run:"
+  echo "    systemctl --user enable --now nova-chatmix"
+  echo "==> If your headset is not detected after install, run:"
+  echo "    sudo udevadm control --reload-rules"
+}