chore: Use split button for menu dropdown

[mrbazzan]

• Update gulpfile.js to use v4 style
• Use split button for menu dropdown

Summary by Sourcery

Apply a split-button pattern to Bootstrap 5 menu items with children and update the gulp watch task to use the gulp v4 series syntax

Enhancements:

• Replace monolithic dropdown toggle with a split-button group for menu items that have children

Build:

• Update gulp watch task to use gulp.series for gulp v4 compatibility

[sourcery-ai[bot]]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

The PR refactors the Bootstrap menu template to use a split button approach for dropdowns and modernizes the Gulp watch task to Gulp v4 syntax.

Class diagram for menu dropdown template changes

classDiagram
    class Child {
      +ancestor: bool
      +children: list
      +selected: bool
      +get_absolute_url()
      +get_menu_title()
    }
    class MenuItem {
      +nav-link: string
      +active: bool
      +dropdown-toggle: bool
      +btn-group: bool
    }
    Child --> MenuItem

Flow diagram for Gulp v4 watch task update

flowchart TD
    A[Start Gulp] --> B[Run 'watch' task]
    B --> C[Watch SASS files]
    C --> D[On change, run 'sass' task using gulp.series]
    D --> E[Compile SASS]

File-Level Changes

Change	Details	Files
Introduce split button structure for menu dropdowns	Changed list item class to btn-group and removed nav-item Converted the dropdown anchor to a primary link only Added a separate button with dropdown-toggle classes Kept the dropdown-menu invocation for child items	djangocms_frontend/templates/bootstrap5/menu.html
Migrate Gulp watch task to v4 style	Replaced array task reference with gulp.series call	gulpfile.js

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[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 89.13%. Comparing base (9844b4c) to head (f3bdadc).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #307   +/-   ##
=======================================
  Coverage   89.13%   89.13%           
=======================================
  Files         124      124           
  Lines        3387     3387           
  Branches      288      288           
=======================================
  Hits         3019     3019           
  Misses        252      252           
  Partials      116      116           

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