feat(gs/home): Install julia

Change-Id: I66820d3209f0ef6120f2946acc2063cfd638512f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2548
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI

users/glittershark/system/home/modules/development.nix

@@ -64,6 +64,7 @@ with lib;
 
     config.lib.depot.third_party.clang-tools
   ] ++ optionals (stdenv.isLinux) [
+    julia
     valgrind
   ];