add recipes

recipes/wip/services/grub/recipe.toml

+#TODO Not compiled or tested
+[source]
+tar = "https://ftp.gnu.org/gnu/grub/grub-2.12.tar.xz"
+[build]
+template = "configure"

recipes/wip/tools/busybox/recipe.toml

+#TODO missing script for GNU Make, see https://www.busybox.net/FAQ.html#configure
+#TODO cross-compilation - https://www.busybox.net/FAQ.html#build
+[source]
+tar = "https://www.busybox.net/downloads/busybox-1.36.1.tar.bz2"
+[build]
+template = "custom"

recipes/wip/tools/toybox/recipe.toml

+#TODO missing script for GNU Make, see https://www.landley.net/toybox/code.html#building
+[source]
+tar = "https://www.landley.net/toybox/downloads/toybox-0.8.9.tar.gz"
+[build]
+template = "custom"

recipes/wip/tools/ventoy/recipe.toml

+#TODO missing script for cross-compilation, see https://github.com/ventoy/Ventoy/blob/master/DOC/BuildVentoyFromSource.txt
+#TODO missing dependencies, try to figure out what it needs at build-time and runtime
+[source]
+git = "https://github.com/ventoy/Ventoy"
+rev = "3f65f0ef03e4aebcd14f233ca808a4f894657802"
+[build]
+template = "custom"