Feature/5987 lazyload css

[CrochetFeve0251]

Description

Please include a summary of the change and which issue is fixed/closed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes #(issue number)

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality).
• Bug fix (non-breaking change which fixes an issue).
• Enhancement (non-breaking change which improves an existing functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as before).
• This change requires a documentation update.

Is the solution different from the one proposed during the grooming?

Please describe in this section if there is any change to the groomed solution, and why.

Checklists

Generic development checklist

• My code follows the style guidelines of this project, with adapted comments and without new warnings.
• I have added unit and integration tests that prove my fix is effective or that my feature works.
• The CI passes locally with my changes (including unit tests, integration tests, linter).
• Any dependent changes have been merged and published in downstream modules.
• If applicable, I have made corresponding changes to the documentation. Provide a link to the documentation.

Test summary

• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I validated all Acceptance Criteria of the related issues. (If applicable, provide proof).
• I validated all test plan the QA Review asked me to.

If not, detail what you could not test.

Please describe any additional tests you performed.