Docs for v4.9.0 (#263)

* Add the superscript_exponent.ipynb cookbook.

* Add the latex_support.ipynb cookbook.

* Update new cookbooks.

* Dokka: Mention tooltips='none' option in the documentation.

* Dokka: Small fix in KDocs.

* Dokka: Add note about hiding axis tooltips.

* Small updates in superscript_exponent.ipynb plot.

* Writerside: Update the aesthetics page: custom line patterns and 3-digit hex colors.

* Writerside: Update info about scientific notation on the 'Formatting' page.

* Add lp_verse demo notebook.

* Writerside: Add section 'Extended Text Markup' to the Charts page. Add notebook lp_verse.ipynb to this section, and to the Gallery.

* Dokka: Add link to the expand_limits.ipynb.

* Add new demo notebook: sunshine_hours.ipynb.

* Writerside: Add sunshine_hours demo to the gallery.

* Writerside: Update formatting examples on the corresponding page.

* Small fix in the new cookbooks: remove mention of restrictions on export.

* Writerside: Fix custom linetype examples on the aesthetics page.

* Add lp_verse.ipynb example to the f-4.9.0/ directory.

* Docs: Remove last links to the old markdown documents.

* Docs: Remove old markdown documents.

* Docs: Remove other old links.

* Docs: Fix links to the old notebooks from the docs/examples/jupyter-notebooks/ directory in CHANGELOG.md file.

* Docs: Fix links to the old markdown documents in CHANGELOG.md file.

* Writerside: Tiny fix in the notebook name.

* Docs: Remove notebooks that was moved to the lets-plot-docs repository.

* Dokka: Add link to the interact_pan_zoom.ipynb demo.

* Writerside: Add interact_pan_zoom.ipynb demo to the site.

* Update notebook and previews for the lp_verse because of Kandy.

* Writerside: Add legend_theme.ipynb notebook to the gallery.

---------

Co-authored-by: Artem Smirnov <asmirnov@horis.ru>

Author: alshan

CHANGELOG.md

@@ -56,7 +56,7 @@ p + ggsize(700, 350)
 <br/>
 
 See the "Quickstart" notebook in [Datalore](https://datalore.jetbrains.com/view/notebook/aTA9lQnPkRwdCzT6uy95GZ) or
-[Jupyter nbviewer](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/quickstart.ipynb).
+[Jupyter nbviewer](https://nbviewer.org/github/JetBrains/lets-plot-docs/blob/master/source/kotlin_examples/cookbook/quickstart.ipynb).
 
 
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