[WEB-2316] chore: Kanban group virtualization

[rahulramesha]

This PR adds group wise virtualization to Kanban groups to fix faster reaction times with large number of groups/columns. This is to make sure the user experiences faster perceived performance.

Summary by CodeRabbit

• New Features

  • Introduced a new optional property useIdletime for improved rendering behavior in the RenderIfVisible component.
  • Enhanced Kanban component with subgroup management through the new subGroupIndex prop.
  • Added a new KanbanColumnLoader component for improved layout rendering in Kanban views.
  • Implemented a function to dynamically calculate the approximate height of Kanban cards.

• Bug Fixes

  • Adjusted visibility and rendering logic for better performance in the Kanban component.

• Refactor

  • Updated rendering logic in several components to optimize performance and maintainability.

[coderabbitai[bot]]

Walkthrough

This pull request introduces several enhancements across multiple components, including the addition of new properties and functionalities to improve rendering logic. Key changes include the introduction of the useIdletime property in the RenderIfVisible component, modifications to the KanBan component to utilize this new feature, and the addition of the getApproximateCardHeight utility function. Furthermore, new loader components have been created to streamline the Kanban layout, enhancing overall performance and flexibility.

Changes

Files	Change Summary
web/core/components/core/render-if-visible-HOC.tsx	Added useIdletime property to Props type, modifying visibility logic to conditionally use requestIdleCallback. Adjusted className logic for better handling of placeholderChildren.
web/core/components/issues/issue-layouts/kanban/default.tsx	Introduced subGroupIndex prop to IKanBan interface. Integrated RenderIfVisible for conditional rendering of KanbanGroup, optimizing performance. Refined height calculation for groups using getApproximateCardHeight. Updated mapping of list to include groupIndex.
web/core/components/issues/issue-layouts/kanban/swimlanes.tsx	Modified SubGroupSwimlane component to pass subGroupIndex to child components, enhancing subgroup management.
web/core/components/issues/issue-layouts/utils.tsx	Added getApproximateCardHeight function to calculate dynamic height of Kanban cards based on display properties.
web/core/components/ui/loader/layouts/kanban-layout-loader.tsx	Updated KanbanIssueBlockLoader to accept cardHeight prop. Introduced KanbanColumnLoader for rendering columns of issue blocks, improving modularity and code structure.

Suggested labels

🌟enhancement

Poem

🐇 In the garden where changes bloom,
A new prop dances, dispelling gloom.
With loaders bright and heights refined,
The Kanban flows, perfectly aligned.
Hooray for updates, let’s celebrate,
In code we trust, our future is great! 🌼

[!TIP]

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