add lazygit toggleterm

plugins/toggleterm.nix

@@ -1,7 +1,18 @@
 # homepage: https://github.com/akinsho/toggleterm.nvim
 # nixvim doc: https://nix-community.github.io/nixvim/plugins/toggleterm/index.html
 _:
+let
+  # https://github.com/AstroNvim/AstroNvim/blob/v4.7.7/lua/astronvim/plugins/toggleterm.lua#L14-L19
+  lazygit_exec = ''
+  function() 
+    local worktree = require("astrocore").file_worktree()
+    local flags = worktree and (" --work-tree=%s --git-dir=%s"):format(worktree.toplevel, worktree.gitdir) 
+      or ""
 
+    require("astrocore").toggle_term_cmd(table.concat({"lazygit", flags}))
+  end
+  '';
+in
 {
   opts = {
     enable = true;
@@ -101,5 +112,17 @@ _:
       action = "<cmd>TermSelect<cr>";
       options.desc = "List terminals";
     }
+    {
+      mode = "n";
+      key = "<Leader>gg";
+      action.__raw = lazygit_exec;
+      options.desc = "ToggleTerm lazygit";
+    }
+    {
+      mode = "n";
+      key = "<Leader>tl";
+      action.__raw = lazygit_exec;
+      options.desc = "ToggleTerm lazygit";
+    }
   ];
 }