Fix SCSS compilation for custom plugin Bootstrap Styles and resolve missing CSS files in varbase_layout_builder/gin library

Problem/Motivation

Having the following Warning for page not found for the following css and asset images

themes/gin/css/components/paragraphs_eev
themes/gin/css/components/node_previewv

css/images/plugins/horizontal-alignment/align-start.svg
css/images/plugins/horizontal-alignment/align-end.svg
css/images/plugins/vertical-alignment/align-top.svg
css/images/plugins/vertical-alignment/align-middle.svg

Proposed resolution

• Fix Gin theme library
• Fix compiling SCSS files for custom Bootstrap Styles plugins

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 10.0.0-alpha2, varbase_layout_builder-10.1.0-alpha3

Varbase update type

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

User interface changes

After the fix LTR:

After the Fix RTL:

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3365317: Fixed SCSS compilation for custom plugin Bootstrap Styles and resolve missing CSS files in varbase_layout_builder/gin library