add package for 'biri', a fork of niri with PRs merged

flake.lock

@@ -251,6 +251,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-26-05": {
+      "locked": {
+        "lastModified": 1788297115,
+        "narHash": "sha256-Z+vUNbfd2FIKkWOTkcT7RYlh3oFCnig/d2eXD1SWf2E=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "a3116115851d68b8952a2a4221cc25a84e56b532",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-26.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-lib": {
       "locked": {
         "lastModified": 1785031560,
@@ -319,6 +335,7 @@
         "home-manager": "home-manager",
         "import-tree": "import-tree",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-26-05": "nixpkgs-26-05",
         "noctalia": "noctalia",
         "spicetify": "spicetify",
         "stylix": "stylix"