Add c++ shell

cpp/flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1771932323,
+        "narHash": "sha256-3PadsTzuMJT/x0KmiD/Me1GG6rW8kaHoWVduSs0ue7o=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "89bb5c5da7a857869cc88ef9b856bffdff8af264",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable-small",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

cpp/flake.nix

@@ -0,0 +1,26 @@
+{
+  description = "Central C++ Dev Shell";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable-small";
+
+  outputs = { self, nixpkgs }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      devShells.${system}.default = pkgs.mkShell {
+        nativeBuildInputs = with pkgs; [
+          gcc
+          cmake
+          ninja
+          gdb
+          pkg-config
+        ];
+
+        buildInputs = with pkgs; [
+        ];
+        shellHook = ''
+          export LD_LIBRARY_PATH=$LD_LIBRARY_PATH
+        '';
+      };
+    };
+}