Add gitsigns plugin

modules/home-manager/nixvim/plugins/conform.nix

@@ -1,4 +1,4 @@
-{ ... }:
+{ pkgs, ... }:
 
 {
   programs.nixvim = {
@@ -14,7 +14,6 @@
           local disable_filetypes = { c = true, cpp = true }
           return {
             timeout_ms = 500
-            lsp_fallback = not disable_filetypes[vim.bo[bufnr].filetype]
           }
         end
       '';

modules/home-manager/nixvim/plugins/default.nix

@@ -7,5 +7,6 @@
     ./treesitter.nix
     ./telescope.nix
     ./lazygit.nix
+    ./conform.nix
   ];
 }

modules/home-manager/nixvim/plugins/gitsigns.nix

@@ -0,0 +1,16 @@
+{ ... }:
+
+{
+  programs.nixvim.plugins.gitsigns = {
+    enable = true;
+    settings = {
+      signs = {
+        add = { text = "+"; };
+        change = { text = "~"; };
+        delete = { text = "_"; };
+        topdelete = { text = "‾"; };
+        changedelete = { text = "~"; };
+      };
+    };
+  };
+}