add(nix): add binary cache `zellij` (#1157)

adds a binary cache called `zellij`, hosted by
https://www.cachix.org/
to the project, users can now use the cache by running:
```
cachix use zellij
```

Step by step:
```
bash <(curl -L https://nixos.org/nix/install)
nix-env -iA cachix -f https://cachix.org/api/v1/install
cachix use zellij
nix-build
```

Documentation: https://docs.cachix.org/installation#

1 files changed, 2 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
index af11e7cad..5873ebd21 100644
--- a/flake.nix
+++ b/flake.nix
@@ -67,6 +67,8 @@
             pkgs.nixpkgs-fmt
             # optimizes wasm binaries
             pkgs.binaryen
+
+            pkgs.jq
           ];
 
         in