feat: Illustration Component, Improve Table Component typings

[RohitRaj011]

Description

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

Type of change

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

Checklist

• The title of the PR states what changed and the related issues number (used for the release note).
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas

[Copilot]

Pull Request Overview

This PR adds a new Illustration component (with generation script and pre-commit hook), a PortalContainer component, enhances the UserIdentifier component, and refactors the Table components to use fully generic typings.

• Introduce IllustrationBase/Illustration and integrate into empty states, plus add generate-illustration script and hook
• Add PortalContainer for dynamic portal mounting
• Convert Table utilities and types to generic RowData, FilterVariant, and AdditionalProps

Reviewed Changes

Copilot reviewed 25 out of 30 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/Shared/Components/index.ts	Export new Illustration and PortalContainer
src/Shared/Components/Illustration/*	Add Illustration component, types, and auto-generated map
scripts/generate-illustration.cjs	New script to build Illustration map
.husky/pre-commit	Hook to run illustration generation on relevant changes
src/Shared/Components/PortalContainer/PortalContainer.tsx	Create PortalContainer with useLayoutEffect
src/Shared/Components/UserIdentifier/*	Add displayYouLabelForCurrentUser prop
src/Shared/Components/Table/types.ts, utils.ts, *	Refactor Table to fully generic typings
src/Common/EmptyState/GenericEmptyState.tsx	Use Illustration in empty states
src/Shared/Components/Header/PageHeader.tsx	Guard rendering of headerName