feat: added a formatter and some instructions

flake.lock

@@ -20,6 +20,29 @@
         "type": "github"
       }
     },
+    "alejandra": {
+      "inputs": {
+        "fenix": "fenix",
+        "flakeCompat": "flakeCompat",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1660510326,
+        "narHash": "sha256-xFumnivtVwu5fFBOrTxrv6fv3geHKF04RGP23EsDVaI=",
+        "owner": "kamadorueda",
+        "repo": "alejandra",
+        "rev": "ef03f7ef74ec97fd91a016a51c9c9667fb315652",
+        "type": "github"
+      },
+      "original": {
+        "owner": "kamadorueda",
+        "ref": "3.0.0",
+        "repo": "alejandra",
+        "type": "github"
+      }
+    },
     "arion": {
       "inputs": {
         "flake-parts": "flake-parts",
@@ -78,6 +101,28 @@
         "type": "github"
       }
     },
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "alejandra",
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
+      },
+      "locked": {
+        "lastModified": 1657607339,
+        "narHash": "sha256-HaqoAwlbVVZH2n4P3jN2FFPMpVuhxDy1poNOR7kzODc=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "b814c83d9e6aa5a28d0cf356ecfdafb2505ad37d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -133,6 +178,22 @@
         "type": "github"
       }
     },
+    "flakeCompat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1650374568,
+        "narHash": "sha256-Z+s0J8/r907g149rllvwhb4pKi8Wam5ij0st8PwAh+E=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "b4a34015c698c7793d592d66adbab377907a2be8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "haskell-flake": {
       "locked": {
         "lastModified": 1675296942,
@@ -401,6 +462,7 @@
     "root": {
       "inputs": {
         "agenix": "agenix",
+        "alejandra": "alejandra",
         "arion": "arion",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs_3",
@@ -412,6 +474,23 @@
         "skynet_website_2016": "skynet_website_2016"
       }
     },
+    "rust-analyzer-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1657557289,
+        "narHash": "sha256-PRW+nUwuqNTRAEa83SfX+7g+g8nQ+2MMbasQ9nt6+UM=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "caf23f29144b371035b864a1017dbc32573ad56d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
+        "type": "github"
+      }
+    },
     "simple-nixos-mailserver": {
       "inputs": {
         "blobs": "blobs",