feat: instances view (replaces the table component)

[donghaoren]

• New Instances view: Replaces the standalone @embedding-atlas/table package with a new unified "Instances" chart type that supports both table and cards view modes. The new implementation lives in packages/viewer/src/charts/instances/ and includes sorting, pagination, and custom SQL query.

• Removed @embedding-atlas/table package: Deleted the entire packages/table/ directory (~3,500 lines) as the functionality is now replaced by the new instances view..

• Liquid template support: Use liquidjs (https://liquidjs.com/) for template rendering in column renderers and custom card templates. This allows users to use their own HTML for their cards and table cells.

• Multi-point highlight: Updated the highlight system to support multiple selected points, with corresponding changes in the Embedding view.

• Column styles: Enhanced column style support with per-view overrides for the instances view; save the column styles to the app state so they can be recovered when the app is reloaded.

• Copy state button: Add a button to copy the app's state as JSON to clipboard.

Breaking changes:

• table view type is removed.
• The tableCellRenderers prop for the EmbeddingAtlas component is removed. Use registerRenderer and columnStyles in initialState to set custom renderers.