move flake to own repository

templates/cpp_flake.nix

@@ -0,0 +1,38 @@
+# flake.nix
+{
+  description = "C/C++ environment";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = {nixpkgs, ...}: let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+    llvm = pkgs.llvmPackages_latest;
+  in {
+    devShells.${system}.default = pkgs.mkShell {
+
+      packages = with pkgs; [
+        gcc
+        #builder
+        cmake
+        gnumake
+        #headers
+        clang-tools
+        #lsp
+        llvm.libstdcxxClang
+        #tools
+        cppcheck
+        valgrind
+        doxygen
+      ];
+      hardeningDisable = ["all"];
+      # direnv does not allow aliases, use scripts as a workaround
+      shellHook = ''
+      PATH_add ~/.dotfiles/scripts/devShell
+      '';
+      # ...
+
+    };
+  };
+}