feat(ui): Configurable summary section on search results

[DiogoVala]

Our users requested more information on the search result cards of asset, so they don't have to click each result individually to open the Summary side panel.
This feature proposes a configurable field that appears in the search card, for which the description comes from a structured property. Both the label of this summary section and the structured property urn from which to fetch the data are configurable. We chose a structured property so that both users and possibly external tools can populate this field.

[github-actions]

Linear: CAT-1622

Thanks for your contribution! We have created an internal ticket to track this PR. A member of the core DataHub team will be assigned to review it within the next few business days - you will get a follow-up comment once a reviewer is assigned.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[codecov]

Bundle Report

Changes will increase total bundle size by 1.57kB (0.01%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
datahub-react-web-esm	22.69MB	1.57kB (0.01%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: datahub-react-web-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/index-*.js	1.57kB	12.45MB	0.01%

Files in assets/index-*.js:

• ./src/app/previewV2/SearchCardSummarySection.tsx → Total Size: 2.54kB

• ./src/appConfigContext.tsx → Total Size: 2.82kB

• ./src/app/useAppConfig.ts → Total Size: 1.56kB

• ./src/app/previewV2/DefaultPreviewCard.tsx → Total Size: 9.93kB