this release changes:

• feat: touch-hold context-menu with basic actions (thanks to @silvasch)
• feat: added polygon shape and builder
• feat: added adjust-document Pdf import option that configures the document for improved annotation use-case
• improv: additional color button (default: white) (thanks to @silvasch)
• improv: new keyboard shortcuts for managing windows and tabs (thanks to @silvasch)
• improv: autosave all tabs, but only ones that are flagged modified (thanks to @Doublonmousse)
• improv: don't export empty layers when exporting to xopp (thanks to @Doublonmousse)
• improv: workspace browser is now separated into three sections: folders - rnote notes - other importable files
• improv: use start aspect ratio when resizing and locking aspect-ratio
• improv: renaming file in workspace browser selects only file stem initially
• improv: move document-layout option from canvas-menu to settings
• improv: reduce repaints - when stroke is finished, cache origin-indicator rendering
• improv: added new-window menu entry
• improv: file watcher implementation and rnote file writing, possibly fixing "reload document" toasts when file is saved on windows
• fix: failing export/clipboard-copy with large images (thanks to @Doublonmousse)
• fix: menus positions when opened through keyboard shortcut (thanks to @detiam)
• fix: zoom label not being updated after switching tab
• fix: regression where margin is not applied when exporting selection
• fix: undo/redo triggering document-modified flag