Built-in XSLT extension has 'brackets' setting that prevents bracket-matching for embedded XPath 1.0-3.1 Fixes #102584

Fixes #102684

- introduce sync and cancel buttons
- ability to discard
- update entries on state change with decorations

add eol to IMainCellDto, no more attach/dettach text document but use the actual (sync'd) document or a fallback cell document

related to #101103

Part of #100741

Fixes #102598

Fix #102156

chore: remove redundant code

Adjust non-webview output height when cell width changes

See https://github.com/microsoft/vscode/issues/102296#issuecomment-658882308

Fixes #100457

Part of #102477