feat: initial PKGBUILD collection for the Moonarch ecosystem

Add PKGBUILDs for moonset-git, moonlock-git, and moongreet-git.
Intended as a paru custom AUR source for easy installation of
all Moonarch components via `paru -S moonset-git`.

moonlock-git/.SRCINFO

@@ -0,0 +1,21 @@
+pkgbase = moonlock-git
+	pkgdesc = A secure Wayland lockscreen with GTK4, PAM and fingerprint support
+	pkgver = 0.4.1.r2.g58c0761
+	pkgrel = 1
+	url = https://gitea.moonarch.de/nevaforget/moonlock
+	arch = x86_64
+	license = MIT
+	makedepends = git
+	makedepends = cargo
+	depends = gtk4
+	depends = gtk4-layer-shell
+	depends = gtk-session-lock
+	depends = pam
+	depends = systemd-libs
+	optdepends = fprintd: fingerprint authentication support
+	provides = moonlock
+	conflicts = moonlock
+	source = git+https://gitea.moonarch.de/nevaforget/moonlock.git
+	sha256sums = SKIP
+
+pkgname = moonlock-git