v2.2.0 release

• Added waitForMessage property to the executeScript action to wait until the script outputs a specific string before advancing to the next step, instead of waiting for the process to exit
• Added showProgress property to the executeScript action to control whether the progress notification is shown while the script is executing (default: true)
• Fix preview taking focus when saving a markdown file and only update the preview when editing the current slide
• Custom themes are now loaded from the workspace URL instead of retrieving the file contents
• Fix slide content not updating when navigating between slides that share the same custom layout template
• Add QR preview support with showQR, hideQR, and closePreview actions
• Add qrLayout option to showQR with constrained left/right layout choices
• #210: Add a Snippets Gallery webview to browse and download community snippets directly into .demo/snippets, including downloaded-state indicators and a gallery snippet schema at docs/public/gallery/snippet.schema.json
• #394: Allow relative paths for openWebsite when opening content in the VS Code browser and expose workspace path variables
• #397: Enable running scenes and moves from source file
• #398: Add slide navigator in the preview webview when using a slide group
• #401: Add a new center slide layout that centers all content both vertically and horizontally
• #402: Added an auto-proceed mode for acts to automatically advance to the next move after a specified delay, with the ability to loop back to the beginning of the act when reaching the end
• #407: Added pollDarkTheme and pollControls properties to the showEngageTimePoll action to control the poll embed's theme and controls visibility
• #408: Added a theme builder to create and customize slide themes visually (beta)
• #409: Slide controls redesign to have a more compact layout

Full Changelog: v2.1.1...v2.2.0