add core configuration

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

@@ -0,0 +1,45 @@
+{...}: {
+  programs.nixvim.plugins.gitsigns = {
+    enable = true;
+    settings = {
+      signs = {
+        add.text = "▎";
+        change.text = "▎";
+        delete.text = "";
+        topdelete.text = "";
+        changedelete.text = "▎";
+      };
+
+      signs_staged_enable = true;
+      signcolumn = true;
+      numhl = false;
+      linehl = false;
+      word_diff = false;
+      watch_gitdir = {
+        interval = 1000;
+        follow_files = true;
+      };
+      attach_to_untracked = true;
+      current_line_blame = false;
+      current_line_blame_opts = {
+        virt_text = true;
+        virt_text_pos = "eol";
+        delay = 100;
+        ignore_whitespace = true;
+      };
+
+      current_line_blame_formatter = "<author>, <author_time:%Y-%m-%d> — <summary>";
+      sign_priority = 6;
+      status_formatter = null;
+      update_debounce = 200;
+      max_file_length = 40000;
+      preview_config = {
+        border = "rounded";
+        style = "minimal";
+        relative = "cursor";
+        row = 0;
+        col = 1;
+      };
+    };
+  };
+}