chore(examples): show clicked GeoJSON feature info outside the map

[igorDykhta]

Summary

• Add examples/clicked-feature: a small app that reads visState.clicked and shows a GeoJSON polygon’s shapeName in a host-app sidebar outside Kepler.gl.
• Documents the pattern from discussion How to show Kepler.gl clicked layer info outside of map #3054 (state.keplerGl.<id>.visState.clicked; tooltip picking must stay enabled).

Test plan

• cd examples/clicked-feature && touch yarn.lock && yarn && yarn start
• Click a neighborhood polygon — shapeName appears in the right sidebar
• Click empty map — sidebar returns to the empty state

[Copilot]

Pull request overview

Adds a new examples/clicked-feature sample that demonstrates how a host application can read visState.clicked from kepler.gl Redux state and render clicked GeoJSON feature info (e.g., shapeName) in a sidebar outside the map.

Changes:

• Added a new “Clicked Feature” example app (React + Redux + kepler.gl) that loads sample GeoJSON polygons and displays the last clicked feature in a host-app sidebar.
• Added standalone build/dev tooling for the example via esbuild + Yarn (including tsconfig.json, .yarnrc.yml, and index.html).
• Registered the new example in examples/README.md.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
examples/README.md	Adds the new “Clicked Feature” example to the examples index and links to its README.
examples/clicked-feature/tsconfig.json	TypeScript config for the standalone example.
examples/clicked-feature/src/index.html	HTML entrypoint for the example’s esbuild-served bundle.
examples/clicked-feature/src/app.tsx	Implements the kepler.gl + Redux host app that reads visState.clicked and renders clicked feature details in a sidebar.
examples/clicked-feature/README.md	Documents how the example works and how to run/build it.
examples/clicked-feature/package.json	Declares dependencies and scripts for building/running the example.
examples/clicked-feature/esbuild.config.mjs	esbuild build/dev server configuration (bundling + static HTML copy + singleton dedupe).
examples/clicked-feature/.yarnrc.yml	Yarn configuration for the standalone example workspace.

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