init: readme (#7)

README.md

@@ -0,0 +1,54 @@
+# nvim.nix
+
+## Usage
+
+```nix
+# flake.nix
+inputs = {
+  home-manager = {
+    url = "github:nix-community/home-manager/release-24.05";
+    inputs.nixpkgs.follows = "nixpkgs";
+  };
+  nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
+  nixvim = {
+    url = "github:nix-community/nixvim/nixos-24.05";
+    inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  nvim = {
+    url = "github:NuschtOS/nvim.nix";
+    inputs.home-manager.follows = "home-manager";
+    inputs.nixpkgs.follows = "nixpkgs";
+  };
+};
+```
+
+### NixOS
+
+```nix
+# configuration.nix
+{
+  imports = [ inputs.nvim.nixosModules.nvim ];
+
+  programs.nixvim.enable = true;
+}
+```
+
+### HomeManager
+
+```nix
+# home.nix
+{
+  imports = [ inputs.nvim.homeManagerModules.nvim ];
+
+  programs.nixvim.enable = true;
+}
+```
+
+### Package
+
+```nix
+{
+  environment.systemPackages = [ inputs.nvim.packages.x86_64-linux.nixvim ];
+}
+```