Add migration for T2 fan curve config (#5176)

* Add migration for tuned fan curve on existing T2 installs

* Make sure it's clear to all what migration is being run (even if it doesn't apply to them)

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>

migrations/1775059710.sh

@@ -0,0 +1,11 @@
+echo "Install tuned fan curve for T2 MacBook"
+
+if lspci -nn | grep -q "106b:180[12]" && [[ ! -f /etc/t2fand.conf ]]; then
+  cat <<EOF | sudo tee /etc/t2fand.conf >/dev/null
+[Fan1]
+low_temp=55
+high_temp=75
+speed_curve=linear
+always_full_speed=false
+EOF
+fi