Change the add heading button to redirect to add a Heading Block directly

Problem/Motivation

Currently, add heading button redirects to add blocks page

Proposed resolution

Make the add heading button redirect to the Heading block.

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ✅ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ✅ Release varbase-9.0.15, varbase_layout_builder-10.0.30 , Varbase 10.0.0-beta1, varbase_layout_builder-10.1.0-alpha6

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

After the change:

Section Header Custom Title - Long centered title with a shadow - to use in a section with 2 or more cols and the same background for the section and long title header

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3343169 by Ahmad Abbad: Changed the add heading button to redirect to add a Heading Block directly