expose renderers prop to allow custom internal renderers

[BrianHung]

Possibly solves #946.

In general, this PR allows developers to override rendering behavior for internal cells.

Internal cell renderers are already exposed.

Ideally, we could consolidate customRenderers into renderers, and only require rowMarkers and a basic text cell, the other renderers being optional.

[Copilot]

Pull Request Overview

This PR exposes a custom renderers prop to allow developers to override internal cell rendering behavior, potentially consolidating customRenderers into renderers while still supporting legacy internal cell renderers.

• Updated dependency installation script to include @testing-library/dom.
• Added a new test to verify that custom renderers can override internal cells.
• Modified the DataEditorAll component to accept a custom renderers prop.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
setup-react-18-test.sh	Updated dependency list to include @testing-library/dom.
packages/core/test/data-editor.test.tsx	Added test to check custom renderer override functionality.
packages/core/src/index.ts	Exposed InternalCellRenderer type for enhanced type-safety.
packages/core/src/data-editor-all.tsx	Modified DataEditorAll to support a custom renderers prop.

Comments suppressed due to low confidence (1)

packages/core/test/data-editor.test.tsx:2590

• [nitpick] Review the need for the explicit type assertion to InternalCellRenderer; if possible, adjust the markerCellRenderer type to allow overriding the draw function without a type assertion.

                        draw: spy

[lukasmasuch]

LGTM 👍 Might be good to also list this in the API.md and maybe add one example to the custom drawing story or a new story.