Fix /nix/store taking up a lot of storage

Additionally:
- add arcaea wiki search engine
- fix haskell devshell not evaluating
- remove a big dependency from my neovim setup

devshells/haskell.nix

@@ -5,7 +5,7 @@ pkgs.mkShell {
     ghc
     hpack
     stack
-    fourmolu # Formatter
+    haskellPackages.fourmolu # Formatter
     cabal-install
     haskell-language-server
     haskellPackages.implicit-hie # Automatically generate hie.yaml!

home/features/desktop/firefox/default.nix

@@ -140,6 +140,12 @@ in
             aliases = [ "@yt" "@youtube" ];
           };
 
+          "Arcaea wiki" = mkBasicSearchEngine {
+            url = "https://arcaea.fandom.com/wiki/Special:Search?scope=internal&navigationSearch=true";
+            param = "query";
+            aliases = [ "@ae" "@arcaea" ];
+          };
+
           "Noita wiki" = mkBasicSearchEngine {
             url = "https://noita.wiki.gg/index.php";
             param = "search";

home/features/neovim/default.nix

@@ -49,7 +49,7 @@ let
     libstdcxx5 # Required by treesitter aparently
     # python310Packages.jupytext # Convert between jupyter notebooks and python files
     # graphviz # For rust crate graph
-    haskellPackages.hoogle # For haskell search
+    # haskellPackages.hoogle # For haskell search
 
     # Preview
     # zathura # Pdf reader

hosts/nixos/common/global/nix.nix

@@ -9,14 +9,14 @@
       dates = "weekly";
     };
 
-    # Protect nix shell from garbage collection
-    extraOptions = ''
-      keep-outputs = true
-      keep-derivations = true
-    '';
+    # ~~Protect nix shell from garbage collection~~
+    # This was taking too much storage
+    # extraOptions = ''
+    #   keep-outputs = true
+    #   keep-derivations = true
+    # '';
 
-    # TODO: look into what this does,
-    # and why it was here in my old config
+    # https://nixos.wiki/wiki/Storage_optimization
     optimise.automatic = true;
 
     # This will add each flake input as a registry