chore(owothia): move to //fun/owothia

Owothia graduates, or something.

Mostly I don't want infrastructure to depend on stuff in //users.

Does anyone know where owothia is running anyways?

Change-Id: I198c7ac935736c7aee3ba4fbda1453b82aa10283
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3103
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>

fun/owothia/shell.nix

@@ -0,0 +1,22 @@
+{ pkgs ? (import ../../../. {}).third_party, ... }:
+
+let
+  inherit (pkgs)
+    haskellPackages
+    haskell
+    gitignoreSource
+    ;
+in
+
+(haskellPackages.extend (haskell.lib.packageSourceOverrides {
+  owothia = gitignoreSource ./.;
+})).shellFor {
+  packages = p: [ p.owothia ];
+  withHoogle = true;
+  doBenchmark = true;
+  buildInputs = with haskellPackages; [
+    cabal-install
+    hlint
+    haskell-language-server
+  ];
+}