feat(users/Profpatsch): init ical-smolify

ical, but smol

to fit in qr

Change-Id: I37f99a20cfc96b85778a097b7c4f70923f026cd4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6617
Autosubmit: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>

users/Profpatsch/ical-smolify/default.nix

@@ -0,0 +1,16 @@
+{ depot, pkgs, lib, ... }:
+
+let
+  cas-serve = pkgs.writers.writeHaskell "ical-smolify"
+    {
+      libraries = [
+        pkgs.haskellPackages.iCalendar
+        depot.users.Profpatsch.my-prelude
+        depot.users.Profpatsch.execline.exec-helpers-hs
+
+      ];
+      ghcArgs = [ "-threaded" ];
+    } ./IcalSmolify.hs;
+
+in
+cas-serve