[Devbox] Set up ssh-agent-switcher.

Signed-off-by: jmug <u.g.a.mariano@gmail.com>

flake.lock

@@ -84,6 +84,24 @@
         "type": "github"
       }
     },
+    "flake-utils_3": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "ghostty": {
       "inputs": {
         "flake-compat": "flake-compat_2",
@@ -299,6 +317,22 @@
       }
     },
     "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1749086602,
+        "narHash": "sha256-DJcgJMekoxVesl9kKjfLPix2Nbr42i7cpEHJiTnBUwU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "4792576cb003c994bd7cc1edada3129def20b27d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "release-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_4": {
       "locked": {
         "lastModified": 1747542820,
         "narHash": "sha256-GaOZntlJ6gPPbbkTLjbd8BMWaDYafhuuYRNrxCGnPJw=",
@@ -327,6 +361,7 @@
         "nixpkgs-msft-go": "nixpkgs-msft-go",
         "nixpkgs-unstable": "nixpkgs-unstable_2",
         "sops-nix": "sops-nix",
+        "ssh-agent-switcher": "ssh-agent-switcher",
         "walker": "walker"
       }
     },
@@ -350,6 +385,26 @@
         "type": "github"
       }
     },
+    "ssh-agent-switcher": {
+      "inputs": {
+        "flake-utils": "flake-utils_3",
+        "nixpkgs": "nixpkgs_3"
+      },
+      "locked": {
+        "lastModified": 1749108251,
+        "narHash": "sha256-1tXo21//5Mmy1zfyQoRcaTM6uuK4WHAtFq6PpoCExkY=",
+        "owner": "AYM1607",
+        "repo": "ssh-agent-switcher",
+        "rev": "6cd7ce973cf08656d42e475945216d8c0f0b0c7b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "AYM1607",
+        "repo": "ssh-agent-switcher",
+        "rev": "6cd7ce973cf08656d42e475945216d8c0f0b0c7b",
+        "type": "github"
+      }
+    },
     "systems": {
       "locked": {
         "lastModified": 1681028828,
@@ -366,6 +421,21 @@
       }
     },
     "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_3": {
       "locked": {
         "lastModified": 1689347949,
         "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
@@ -382,8 +452,8 @@
     },
     "walker": {
       "inputs": {
-        "nixpkgs": "nixpkgs_3",
-        "systems": "systems_2"
+        "nixpkgs": "nixpkgs_4",
+        "systems": "systems_3"
       },
       "locked": {
         "lastModified": 1748171996,