greetd: cleanup recipes

-use cargo-update-recipe-crates class
-update regreet
-build agreety with greetd

recipes-support/greetd/gtkgreet/gtkgreet_0.8.bb

@@ -0,0 +1,23 @@
+SUMMARY = "GTK based greeter for greetd, to be run under cage or similar."
+HOMEPAGE = "https://git.sr.ht/~kennylevinsen/gtkgreet"
+LICENSE = "GPL-3.0-only"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=1ebbd3e34237af26da5dc08a4e440464"
+
+DEPENDS = "gtk+3 json-c"
+RDEPENDS:${PN} += "greetd"
+RRECOMMENDS:${PN} += "dbus-broker"
+
+PACKAGECONFIG[layershell] = "-Dlayershell=enabled,-Dlayershell=disabled,gtk-layer-shell"
+
+PACKAGECONFIG ?= "layershell"
+
+inherit meson pkgconfig
+
+SRC_URI = "git://git.sr.ht/~kennylevinsen/gtkgreet;protocol=https;branch=master"
+
+SRCREV = "7202ba6ec2334d64e1449e5f8310a63bd818d448"
+
+EXTRA_OEMESON += " \
+    --buildtype release \
+    -Dman-pages=disabled \
+"