feat(ops/modules): initialise module for running livegrep

Change-Id: Ic22118def24089cda25ccc74c9da670d41c6b323
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10936
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>

ops/machines/whitby/default.nix

@@ -17,6 +17,7 @@ in
     (mod "josh.nix")
     (mod "journaldriver.nix")
     (mod "known-hosts.nix")
+    (mod "livegrep.nix")
     (mod "monorepo-gerrit.nix")
     (mod "owothia.nix")
     (mod "panettone.nix")
@@ -370,6 +371,9 @@ in
     # Run a SourceGraph code search instance
     sourcegraph.enable = true;
 
+    # Run a livegrep code search instance
+    livegrep.enable = true;
+
     # Run the Panettone issue tracker
     panettone = {
       enable = true;