Move the web-service apps to python3-gfhardware/forgefirm-app

gfhome.py, ffmachine.py, and gfcloud.py (with the gfcloud init script
and gfhome conf sample) live in the python3-gfhardware repository's
forgefirm-app/ directory. The three recipes fetch that repo through a
shared include (forgefirm-app.inc) carrying a single pinned SRCREV,
replacing the local file:// copies. Package names, dependencies, and
installed paths are unchanged.

meta-forgefirm/recipes-forgefirm/forgefirm-app/gfhome.bb

@@ -0,0 +1,10 @@
+DESCRIPTION = "One-shot Glowforge web-service homing for ForgeFIRM"
+
+require forgefirm-app.inc
+
+do_install() {
+    install -Dm 0755 ${S}/forgefirm-app/gfhome.py ${D}${sbindir}/gfhome.py
+    install -Dm 0600 ${S}/forgefirm-app/gfhome.conf.sample ${D}${sysconfdir}/gfhome.conf.sample
+}
+
+RDEPENDS:${PN} += "python3-core python3-ffmachine python3-gfhardware python3-gfutilities"