Summary of Changes

Similar to the merged PR #32535 , this PR improves the code add breadcrumbs in category view of com_contact component. The code which we are having right now is a mess, hard to understand and difficult to maintain.

Testing Instructions

1. Update your site to latest 4.0-dev.
2. Access to Components -> Contacts-> Categories, create several categories and sub-categories.
3. Apply patch
4. Test and make sure the breadcrumbs are still handled properly.

Test 1:

• Create a menu item to link to List All Categories in a Contact Category Tree menu item type of contacts component. Choose the parent category in the menu item parameter.
• Access to that menu item, you will see categories list. Access to a child category , look at the breadcrumbs module, make sure breadcrumbs items are added properly (should have the format Home -> Menu Item Title -> Child Category)

Test 2:

• Create a menu item to link to List Contacts in a Category menu item type of contact component. Choose a child category (which contains contacts)
• Access to that menu item, you should see list of contacts added to that category, look at look at the breadcrumbs module, make sure breadcrumb item are added properly (should have the format Home -> Menu Item Title)

If someone can review the code changes, that would be great.