added a few more plugins, got cmp+luasnip working.

LSP is the last major milestone now.

nix/nvim/lsp/lsp.nix

@@ -0,0 +1,11 @@
+{
+  configs,
+  pkgs,
+  ...
+}: {
+  programs.nixvim = {
+  };
+  imports = [
+    # ./outline.nix
+  ];
+}

nix/nvim/lsp/outline.nix

@@ -0,0 +1,22 @@
+{
+  configs,
+  pkgs,
+  ...
+}: {
+  programs.nixvim = {
+    keymaps = [
+      {
+        action = ":Outline<CR>";
+        key = "<leader>o";
+        mode = "n";
+        options = {
+          silent = true;
+          desc = "toggle outline";
+        };
+      }
+    ];
+    extraPlugins = [
+      pkgs.vimPlugins.outline-nvim
+    ];
+  };
+}