refactor: removing needless module complexity

modules/home/programs/nixvim/plugins/lualine.nix

@@ -0,0 +1,69 @@
+{
+  lib,
+  config,
+  ...
+}: let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.home.devtools.nixvim.plugins.lualine;
+in {
+  options = {
+    home.devtools.nixvim.plugins.lualine.enable = mkEnableOption "Enables Lualine plugin for nixvim";
+  };
+
+  config = mkIf cfg.enable {
+    programs.nixvim.plugins.lualine = {
+      enable = true;
+      theme = "gruvbox-material";
+      globalstatus = true;
+
+      sections = {
+        lualine_a = ["mode"];
+        lualine_b = ["branch"];
+        lualine_c = ["filename" "diff"];
+
+        lualine_x = [
+          "diagnostics"
+
+          # Show active language server
+          {
+            name.__raw = ''
+              function()
+                  local msg = ""
+                  local buf_ft = vim.api.nvim_buf_get_option(0, 'filetype')
+                  local clients = vim.lsp.get_active_clients()
+                  local non_null_ls_clients = {}
+
+                  for _, client in ipairs(clients) do
+                      if client.name ~= "null-ls" then
+                          table.insert(non_null_ls_clients, client)
+                      end
+                  end
+
+                  if #non_null_ls_clients > 0 then
+                      for _, client in ipairs(non_null_ls_clients) do
+                          local filetypes = client.config.filetypes
+                          if filetypes and vim.fn.index(filetypes, buf_ft) ~= -1 then
+                              return client.name
+                          end
+                      end
+                  else
+                      for _, client in ipairs(clients) do
+                          if client.name == "null-ls" then
+                              return client.name
+                          end
+                      end
+                  end
+
+                  return msg
+              end
+            '';
+            icon = "";
+            color.fg = "#A89984";
+          }
+          "fileformat"
+          "filetype"
+        ];
+      };
+    };
+  };
+}