Add Bootstrap 5 Utility aliases for Bootstrap 4

Problem/Motivation

#3190716: Start a 10.0.x branch for Varbase Layout Builder to use Bootstrap Styles and Bootstrap Layout Builder

Bootstrap 5.0.0-beta2 was released
https://getbootstrap.com/docs/5.0/migration/#v500-beta2
https://github.com/twbs/bootstrap/releases/tag/v5.0.0-beta2

Proposed resolution

Have a list of basic Bootstrap Utilities 5 aliases for Bootstrap 4

• Alias .border-start for .border-left BS4 class
• Alias .border-start-0 for .border-left-0 BS4 class
• Alias .border-end for .border-right BS4 class
• Alias .border-end-0 for .border-right-0 BS4 class

Border widths

• .border-1
• .border-2
• .border-3
• .border-4
• .border-5

Rounded

• .rounded-1
• .rounded-2
• .rounded-3

Alias .rounded-start for .rounded-left BS4 class
Alias .rounded-end for .rounded-right BS4 class

Alias .text-start for .text-left BS4 class
Alias .text-end for .text-right BS4 class
And RTL support for them

Alias for on Margin and Padding for .ml, .mr, .pl, .pr with .ms, .me, .ps, .pe classes
And RTL support for them

Remaining tasks

User interface changes

None

API changes

None

Data model changes

None