Add support for reordering columns and persisting state

[mattwar]

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[Copilot]

Pull request overview

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Adds per-table column layout persistence (resize + reorder) by introducing a serializable table view state, wiring it through the data table provider, and saving it back into .kqr-backed result documents / singleton views while avoiding webview redraw flashes during page rebuilds.

Changes:

• Introduces ResultTableView and plumbs optional tableViews through ResultData.
• Extends DataTableProvider/DataTableView to accept initial view state, track column resize/reorder in the webview, and notify host listeners.
• Persists updated layout back into .kqr documents and suppresses certain webview messages during HTML rebuild to prevent visible flashes.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
src/Client/tests/unit/dataTableProvider.test.ts	Adds unit coverage for initial view state embedding and host-side updates via setColumnView.
src/Client/features/server.ts	Adds ResultTableView and optional ResultData.tableViews schema for persisted per-table presentation state.
src/Client/features/resultsViewer.ts	Loads saved table view state into table views, listens for changes, and persists them back to .kqr documents; adds suppressMessages to avoid redraw flashes.
src/Client/features/plotlyChartProvider.ts	Clears cached chart HTML/payload to avoid stale chart replay after page rebuilds.
src/Client/features/dataTableProvider.ts	Implements column width persistence + drag/drop column reorder in the table webview and exposes view-state APIs to the host.
src/Client/features/compositeChartProvider.ts	Clears Plotly replay state when delegating rendering to TimePivot.

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