RFR: 8339247: Create release notes for JavaFX 23 [v2]

[Kevin Rushforth]

> This PR adds the release notes for the JavaFX 23 release. This will first go into `master`, and then be backported to the `jfx23` branch so it will be available in that branch when JavaFX 23 is published (and from there also synced into the `jfx23u` repo).
> 
> The following filter was used to produce the list of issues fixed in JavaFX 23:
> 
> https://bugs.openjdk.org/issues/?filter=45422
> 
> Additionally, we had three issues with a `release-note=yes` label, which are included in the list of important changes.
> 
> I will wait until closer to the September 17th release date to integrate this.
> 
> 
> A [suggestion was made last time](https://github.com/openjdk/jfx/pull/1402#issuecomment-1998821014) to split out the new features (something that adds new functionality to the platform) from enhancements. If we decide to do that, here is my proposed split:
> 
> ## List of New Features
> 
> Issue key|Summary|Subcomponent
> ---------|-------|------------
> [JDK-8092102](https://bugs.openjdk.org/browse/JDK-8092102)|Labeled: textTruncated property|controls
> [JDK-8313138](https://bugs.openjdk.org/browse/JDK-8313138)|Scrollbar Keyboard enhancement|controls
> [JDK-8267565](https://bugs.openjdk.org/browse/JDK-8267565)|Support "@3x" and greater high-density image naming convention|graphics
> [JDK-8311895](https://bugs.openjdk.org/browse/JDK-8311895)|CSS Transitions|graphics
> [JDK-8282999](https://bugs.openjdk.org/browse/JDK-8282999)|Add support for EXT-X-MEDIA tag in HTTP Live Streaming|media
> 
> ## List of Other Enhancements
> 
> Issue key|Summary|Subcomponent
> ---------|-------|------------
> [JDK-8321603](https://bugs.openjdk.org/browse/JDK-8321603)|Bump minimum JDK version for JavaFX to JDK 21|build
> [JDK-8322748](https://bugs.openjdk.org/browse/JDK-8322748)|Caret blinking in JavaFX should only stop when caret moves|controls
> [JDK-8322964](https://bugs.openjdk.org/browse/JDK-8322964)|Optimize performance of CSS selector matching|graphics
> [JDK-8324182](https://bugs.openjdk.org/browse/JDK-8324182)|Deprecate for removal SimpleSelector and CompoundSelector classes|graphics
> [JDK-8325900](https://bugs.openjdk.org/browse/JDK-8325900)|Emit a warning on macOS if AWT has set the NSAppearance|graphics

Kevin Rushforth has updated the pull request incrementally with one additional commit since the last revision:

  Split enhancements into two groups; use title case for "Issue Key"

-------------

Changes:
  - all: https://git.openjdk.org/jfx/pull/1553/files
  - new: https://git.openjdk.org/jfx/pull/1553/files/759c9df1..f4c55a61

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1553&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1553&range=00-01

  Stats: 15 lines in 1 file changed: 8 ins; 3 del; 4 mod
  Patch: https://git.openjdk.org/jfx/pull/1553.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1553/head:pull/1553

PR: https://git.openjdk.org/jfx/pull/1553