add aerial

plugins/aerial/package.nix

@@ -0,0 +1,21 @@
+{ pkgs, ...}:
+let 
+  version = "2.1.0";
+in
+pkgs.vimUtils.buildVimPlugin {
+  inherit version;
+
+  name = "aerial";
+
+  # src = pkgs.fetchFromGitHub {
+  #   owner = "stevearc";
+  #   repo = "aerial.nvim";
+  #   rev = "v${version}";
+  #   hash = "sha256:0ip8xmncp82svlbkphlas88xjvzrpzyy5b1c9x06dqbm4ifai0va";
+  # };
+
+  src = builtins.fetchTarball {
+    url = "http://github.com/stevearc/aerial.nvim/archive/v2.1.0.tar.gz";
+    sha256 = "sha256:0ip8xmncp82svlbkphlas88xjvzrpzyy5b1c9x06dqbm4ifai0va";
+  };
+}