[jfx16] RFR: 8262460: Create release notes for JavaFX 16 [v2]

[Abhinay Agarwal]

> Add release notes for JavaFX 16 to the repository

Abhinay Agarwal has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 27 additional commits since the last revision:

 - 8262460: Create release notes for JavaFX 16
 - 8260165: CSSFilterTest.testCSSFilterRendering system test fails
   
   Reviewed-by: kcr, ghb
 - 8260257: [Linux] WebView no longer reacts to some mouse events
   
   Reviewed-by: kcr, jvos
 - 8262236: Configure Gradle checksum verification
   
   Reviewed-by: kcr
 - 8260468: Wrong behavior of LocalDateTimeStringConverter
   
   Reviewed-by: kcr, pbansal
 - 8261927: WebKit build fails with Visual Studio 2017
   
   Reviewed-by: kcr, ghb
 - 8252935: Add treeShowing listener only when needed
   
   Reviewed-by: kcr, arapte
 - 8261460: Incorrect CSS applied to ContextMenu on DialogPane
   
   Reviewed-by: kcr, aghaisas
 - 8248126: JavaFX ignores HiDPI scaling settings on some linux platforms
   
   Reviewed-by: kcr, arapte
 - 8252099: JavaFX does not render Myanmar script correctly
   
   Reviewed-by: prr
 - ... and 17 more: https://git.openjdk.java.net/jfx/compare/f3241470...5e75b332

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

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/414/files
  - new: https://git.openjdk.java.net/jfx/pull/414/files/5e75b332..5e75b332

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=414&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=414&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/414.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/414/head:pull/414

PR: https://git.openjdk.java.net/jfx/pull/414