feat: add collapsible checkbox filters

[abdimo101]

Description

Added collapse/expand functionality to checkbox filters on both dataset and proposal pages.

Motivation

• https://jira.ess.eu/browse/SWAP-5127

Fixes:

Please provide a list of the fixes implemented in this PR

• Items added

Changes:

Please provide a list of the changes implemented by this PR

• changes made

Tests included

• [ ] Included for each change/fix?
• [ ] Passing? (Merge will not be approved unless this is checked)

Documentation

• [ ] swagger documentation updated [required]
• [ ] official documentation updated [nice-to-have]

official documentation info

If you have updated the official documentation, please provide PR # and URL of the pages where the updates are included

Backend version

• [ ] Does it require a specific version of the backend
• which version of the backend is required:

Summary by Sourcery

Add collapsible checkbox filters to dataset and proposal listing pages and cover the behaviour with end-to-end tests.

New Features:

• Introduce per-filter expand/collapse behaviour for checkbox filters on the datasets page.
• Introduce per-filter expand/collapse behaviour for checkbox filters on the proposals page.

Enhancements:

• Style the collapsible filter UI to hide checkbox filter contents when collapsed while keeping other filter types always visible.

Tests:

• Add Cypress end-to-end tests to verify collapsing and expanding checkbox filters on datasets and proposals pages.

[Junjiequan]

One question here, should user know collapsed field can contain applied filters?

[abdimo101]

One question here, should user know collapsed field can contain applied filters?

Good point! It will best for users to know if it has active filters on a collapsed field. I can add something that would indicate it

[abdimo101]

PR now has a filter badge that indicates whether filters are selected when filter fields are collapsed. Picture: