feat: change nix structure

modules/apps.nix

@@ -0,0 +1,32 @@
+{ pkgs, ... }: {
+  environment.systemPackages = with pkgs; [
+    termdown
+    fastfetch
+    neovim
+    deno
+    pnpm
+    terraform
+    gh-copilot
+    gh
+    rcm
+    fnm
+    universal-ctags
+    ripgrep
+    pyenv
+    rustup
+    ngrok
+    marp-cli
+    discord
+    yarn
+    typescript
+    firefox
+    ffmpeg_6
+    warp-terminal
+    raycast
+    bitwarden-desktop
+    jetbrains-toolbox
+    jetbrains.datagrip
+    jetbrains.rider
+    jetbrains.webstorm
+  ];
+}

modules/config.nix

@@ -0,0 +1,5 @@
+{
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+  nixpkgs.config.allowBroken = true;
+  nixpkgs.config.allowUnfree = true;
+}

modules/dotfiles/git.nix

@@ -0,0 +1,26 @@
+{ pkgs, ... }: {
+  home-manager.users.louisgallet = { pkgs, ... }: {
+    programs.git = {
+      enable = true;
+      userName = "Louis Gallet";
+      userEmail = "me@louisgallet.fr";
+      signing = {
+        key = "9AD287ECD257A6B61ECD592CD4C61677B9CC4C9B";
+        signByDefault = true;
+      };
+      extraConfig = {
+        init.defaultBranch = "master";
+        gpg.format = "openpgp";
+        gpg.program =
+          if pkgs.stdenv.isDarwin then "/opt/homebrew/bin/gpg"
+          else "${pkgs.gnupg}/bin/gpg";
+        filter.lfs = {
+          clean = "git-lfs clean -- %f";
+          smudge = "git-lfs smudge -- %f";
+          process = "git-lfs filter-process";
+          required = true;
+        };
+      };
+    };
+  };
+}