visuals/fidget: migrate to newer configuration with custom setup options

modules/visuals/fidget/config.nix

@@ -0,0 +1,16 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib) mkIf nvim;
+  cfg = config.vim.visuals.fidget-nvim;
+in {
+  config = mkIf cfg.enable {
+    vim.startPlugins = ["fidget-nvim"];
+
+    vim.luaConfigRC.fidget-nvim = nvim.dag.entryAnywhere ''
+      require'fidget'.setup(${nvim.lua.toLuaObject cfg.setupOpts})
+    '';
+  };
+}