Add native Roam renderer for presentations

.gitignore

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 .env
 extension.js
 extension.js.LICENSE.txt
-  
+local/

CHANGELOG.md

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+# Changelog
+
+## Unreleased
+
+- Fixed presentation2 overflow scaling so long text wraps across the full slide width.
+- Fixed native tables in presentation2 to use the slide width, inherit the active theme, render complete borders, and hide their duplicate source outline.
+- Fixed presentation2 title detection and hidden-block handling after filtering hidden slide children.
+- Added a bounded overflow fallback for presentation2 slides that cannot fit at the minimum scale.
+- Kept image and iframe source descendants closed while preserving expanded native media layouts.

README.md

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 Type `{{presentation}}` or `{{slides}}` in a block. Clicking the button will overlay a presentation directly from Roam! Exit the presentation by hitting 'ESC'.
 
+An experimental native-renderer path is available alongside the current
+renderer. Use `{{presentation2}}` or `{{slides2}}` to render slide content with
+Roam's declarative React APIs while leaving `presentation` and `slides`
+unchanged.
+<!-- The paired copy/paste baseline and native-component coverage deck are in
+[`fixtures`](fixtures/README.md), and the two component trees are documented in
+[`docs/native-renderer-architecture.md`](docs/native-renderer-architecture.md). -->
+
 To specify what content is part of the presentation, create a child block for each slide. The text of each child will serve as the slide title. Each child block then in turn renders its children as the slide contents in a bulleted outline. For example, the Playground presentation below uses the following structure:
 
 ```