shell: Replace wget / httpie with xh

The year is 2024 and httpie is no longer in fashion. httpie was broken
on NixOS anyway due to certificate verification errors, and wget is
unnecessary overall since scripts that depend on it have their own $PATH
with it available.

See: https://github.com/NixOS/nixpkgs/issues/94666

modules/shell.nix

@@ -22,12 +22,12 @@ in
     systemPackages = mkMerge [
       (attrValues {
         inherit (pkgs)
-          wget
           jq
           eza
           fd
           fzf
           ripgrep
+          xh
           file
           timg
           choose
@@ -36,7 +36,6 @@ in
           ;
         inherit (pkgs)
           treefmt
-          httpie
           yt-dlp
           sox
           asak