Add nix flake with devshell

flake.lock

@@ -0,0 +1,26 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1744932701,
+        "narHash": "sha256-fusHbZCyv126cyArUwwKrLdCkgVAIaa/fQJYFlCEqiU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b024ced1aac25639f8ca8fdfc2f8c4fbd66c48ef",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,33 @@
+{
+  description = "Leek flake";
+
+  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
+
+  outputs = { nixpkgs, ... }:
+    let
+      pkgs = nixpkgs.legacyPackages.x86_64-linux;
+      lib = nixpkgs.lib;
+    in
+    {
+      devShells.x86_64-linux.default = pkgs.mkShell {
+        name = "leek-devshell";
+        packages =
+          let
+            kdeDeps = with pkgs.kdePackages; [
+              extra-cmake-modules
+              qtbase
+              qtdeclarative
+              kirigami
+              ki18n
+              kcoreaddons
+              qqc2-desktop-style
+            ];
+          in
+          with pkgs; [
+            clang-tools
+            cmake
+          ] ++ kdeDeps;
+      };
+    };
+}
+