[chore] DuckDB demo app

[igorDykhta]

• NOT FOR MASTER BRANCH !!! DON'T MERGE. THIS BRANCH IS USED FOR kepler-preview.foursquare.com

• inject DuckDb plugin and DuckDb table

• disable not configured cloud storage providers - Dropbox, Carto

• disable release banner

• disable progressive arrow data loading which doesn't work with DuckDB

• show Example data panel by default

• move tileset examples to the top, remove trips example

• fix for custom domains under SPA page / netlify

[netlify]

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[Copilot]

Pull Request Overview

This PR configures a DuckDB demo application by enabling DuckDB integration, disabling incompatible features, and customizing the UI for a preview deployment. The changes focus on making the demo app work specifically with DuckDB while maintaining core functionality.

Key changes:

• Enables DuckDB plugin integration and disables progressive arrow loading
• Removes cloud storage providers (Dropbox, Carto) that aren't configured for the preview domain
• Customizes sample data presentation by prioritizing tileset examples and removing incompatible datasets

Reviewed Changes

Copilot reviewed 11 out of 13 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/components/src/modals/modal-tabs.tsx	Adds className prop support for custom tab styling
src/components/src/modals/load-data-modal.tsx	Updates default method selection and adds callback for data loading
package.json	Adds esbuild-plugin-copy dependency
examples/demo-app/src/static/_redirects	Adds Netlify SPA redirect configuration
examples/demo-app/src/reducers/index.js	Enables DuckDB plugin and disables progressive loading/release banner
examples/demo-app/src/components/load-data-modal/sample-maps-tab.js	Updates styling for active tab states
examples/demo-app/src/components/load-data-modal/sample-data-viewer.js	Adds "Add data" helper button
examples/demo-app/src/cloud-providers/index.js	Disables Dropbox and Carto cloud providers
examples/demo-app/src/actions.js	Reorders sample data and filters out incompatible examples
examples/demo-app/package.json	Adds esbuild-plugin-copy dependency
examples/demo-app/esbuild.config.mjs	Configures file copying for build process

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