WIP: 0.39 release notes (#3775)

* docs: initial release notes

* Added bug fixes and small improvements to misc section in our 0.39 release notes

* doc: adding more for 0.39

* doc: adding gif

---------

Co-authored-by: Alexander Thor <[email protected]>
Co-authored-by: Andrew Tsao <[email protected]>

docs/blog/0.39.md

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+---
+
+date: 2024-01-09
+image: https://github.com/rilldata/rill/assets/5587788/b30486f6-002a-445d-8a1b-955b6ec0066d
+
+---
+
+# Rill 0.39 - Vacations, spending time away from keyboard and new ways of filtering
+
+:::note
+⚡ Rill Developer is a tool that makes it effortless to transform your datasets with SQL and create fast, exploratory dashboards.
+
+To [try out Rill Developer, check out these instructions](../../install) and [join us over on Discord](https://bit.ly/3bbcSl9) to meet the team behind the product as well as other users!
+:::
+
+![release-0 39](https://cdn.rilldata.com/docs/release-notes/release-0.39-gif)
+
+After a couple of days of holiday break we are back at it again with yet another release. This time around it's a smaller one as we have been busy digesting holiday food and putting away all of those Christmas decorations (who are we kidding, they will still be up come February...)
+
+Also a big shout-out to our community members [Fred](https://github.com/fredguth), [Christian](https://github.com/cwarden) and [Frederik](https://github.com/Fredehagelund92) for contributing to the project!
+
+## Add Filter
+You can now add new filters directly from the filter bar.  
+As we are adding more and more areas to Rill the need to be able to quickly add a new filter without having to go back to the Explore overview became apparent and... now you can!
+
+## Auto-suggestion of models
+Rill Developer will now auto-suggest model names as part of our auto-completion when writing SQL.  
+This should make it easier to write transformation steps within projects with a large number of models.
+
+## Daylight savings support
+We have added DST support for our timeseries charts to properly handle time-jumps
+
+## Bug Fixes and Misc
+- Updated project status page to reflect both the most recent time when a source or model has been refreshed _and_ the most recent time the project files in Github have been synced.
+- Added further hardening and resiliency in the runtime backend to prevent potential OOM or deadlock scenarios related to DuckDB.
+- Added dimension name and percent of total to charts.
+- Added further consistency in colors being used in themes.
+- Fixed scenario where the horizontal splitters in the UI could overflow its parent container.
+- Improved the responsiveness and rendering of timeseries charts.
+- Improved error handling and hardening related to saved views on dashboards.
+- Addressed a bug where searching in a dimension table would sometimes return a 400 error in very specific scenarios.
+- Added support for templating and use of variables in source YAML files.
+- Improved the design of our Scheduled Report dropdown menus.
+- Fixed a bug when using the "View as" functionality in the Cloud UI.
+- Added clearer messaging when autogenerating dashboards.
+- Added ability to define arbitrary, non-aggregrate dimension expressions via the `expression` property in the dashboard YAML.
+- Added support to resize the _Model Data_ dashboard component / view in the Rill Developer UI.
+- Fixed bug related to the Shift-click to copy functionality not working as expected.