v0.2.0-preview.1

Added

• Targets: the libraries also build for net8.0, next to net10.0 and net11.0. The net8.0 build needs StreamMark
  0.1.0-alpha.25, which adds net8.0 to its packages.
• Markdown (TKCode.Arc): an outline and find. GetOutline, ScrollToPoint, ScrollToAnchor, Find and
  GetSelectedText, with the IsDocumentReady, MatchCount, CurrentMatchIndex and HasSelection properties and the
  DocumentReady and SearchChanged events. A host can build an outline sidebar, a find bar and a copy action around the
  document.
• RichTextEditor (TKCode.Arc): TrySetMarkdown imports Markdown and returns a RichTextImportReport that lists what
  the editor could not keep (RichTextImportIssueKind: heading depth, fence info strings, tilde fences, tables and so on).
• DataGrid (TKCode.Arc.AdvancedCharts, in the repository, not on NuGet yet): cell renderers (badge, progress, link,
  icon text, checkbox, actions), validation rules (required, range, max length, pattern), conditional format rules, a
  CellInvoked event, a context menu event, CSV export options, and filter and layout state.
• Blocks (TKCode.Arc.Blocks, in the repository, not on NuGet yet): the command palette dialog; search results with
  value and date filters, details and actions; sidebar collapse and resize modes; the reworked notification center.

Changed

• AtomUI is pinned to 6.2.7; 0.1.1-preview.1 was built on 6.2.6. The AtomUI dependency moves with the Arc version.
• DataGrid CSV export neutralizes spreadsheet formulas by default (NeutralizeCsvFormulas), and a paste larger than
  MaxPasteCells (1,000,000 cells by default) is refused.
• On .NET 8 and 9 the DataGrid's natural text sort uses a built-in comparer; on .NET 10 and later it uses
  CompareOptions.NumericOrdering, as before.

Fixed

• LiveLoop.Start returns early when it is already delivering frames, so a caller that starts the loop on every pointer
  move no longer re-reads the gates each time.

Full changelog: v0.1.1-preview.1...v0.2.0-preview.1