Add neovim config using nixvim

programs/nixvim/_plugins/telescope.nix

@@ -0,0 +1,55 @@
+{ ... }:
+
+{
+  programs.nixvim = {
+    plugins.telescope = {
+      enable = true;
+
+      extensions = {
+        fzf-native.enable = true;
+        ui-select.enable = true;
+        undo.enable = true;
+      };
+
+      keymaps = {
+        "<leader>ff" = "find_files";
+        "<leader>fg" = "live_grep";
+        "<leader>b" = "buffers";
+        "<leader>fh" = "help_tags";
+        "<leader>fd" = "diagnostics";
+
+        "<C-p>" = "git_files";
+        "<leader>p" = "oldfiles";
+        "<C-f>" = "live_grep";
+      };
+
+      settings.defaults = {
+        file_ignore_patterns = [
+          "^.git/"
+          "^.mypy_cache/"
+          "^__pycache__/"
+          "^output/"
+          "^data/"
+          "%.ipynb"
+        ];
+        set_env.COLORTERM = "truecolor";
+      };
+    };
+
+    keymaps = [
+      {
+        mode = "n";
+        key = "<C-t>";
+        action.__raw = ''
+          function()
+            require('telescope.builtin').live_grep({
+              default_text="TODO",
+              initial_mode="normal"
+            })
+          end
+        '';
+        options.silent = true;
+      }
+    ];
+  };
+}