feat: vmsuite.sh and the cli suite: G1-G3, F1-F7 of TESTPLAN.md as unattended checks

Each block in share/vmtest/<suite>/ starts from a fresh ssh-ready snapshot, gets a
Plasma session environment over ssh (the theme item needs one) and prints PASS/FAIL
lines. ONLY=<prefix> runs one block. 55 checks pass on the plain CachyOS VM.

share/vmtest/cli/20-f3-everything-desktop.sh

@@ -0,0 +1,7 @@
+# F3: every item and --boot desktop: all on, the boot-desktop unit enabled, VRAM left out with a warning.
+out=$(sf --defaults --options gaming,theme,glyphs,single,launcher,notify,vram,cec,machine,poweroff --boot desktop); rc=$?
+[[ $rc -eq 0 ]] && pass "F3 exit 0" || fail "F3 exit $rc"
+expect_on gaming theme glyphs single launcher notify machine poweroff cec
+grep -qi "VRAM booster" <<< "$out" && pass "F3 VRAM booster left out with a warning" || fail "F3 no VRAM warning"
+is vram && fail "F3 vram is on (the VM has no dmem region)" || pass "F3 vram stays off"
+systemctl is-enabled steamify-boot-desktop.service >/dev/null 2>&1 && pass "F3 boot-desktop unit enabled" || fail "F3 boot-desktop unit not enabled"