Feature/directory sorting

[syedgalib]

PR Type

What kind of change does this PR introduce?

• Bugfix
• Security fix
• Improvement
• New Feature
• Refactoring (no functional changes, no api changes)
• Build related changes
• Text changes
• Other... Please describe:

Description

• Add - Assign sorting order to new directory on directory creation.
• Add - Assign directory sorting order to missing ones on plugin activation.
• Add - Assign directory sorting order to missing ones on migration.
• Add - Drag and drop feature in directory list.
• Add - Show directory list in custom order in All directory page (Admin Dashboard), Search Form, All Listing Page, Add Listing page etc.
• Remove - Old user migration codes ( Version 6 to 7 ).

Any linked issues

Fixes #

Checklist

• My code follows the WordPress coding standards