RFR: 7903962: Update IDEA plugin documentation [v2]

[Oleksii Sylichenko]

> Update menu item location to open default settings window.
> 
> Current location is: `File -> New Projects Setup -> Settings for New Projects...`
> 
> Checked in "IntelliJ IDEA 2024.3.2.2 (Community Edition)".
> 
> ![Default settings menu location](https://github.com/user-attachments/assets/e9b94e74-5bea-476f-bcb1-f75ce76f3fc2)

Oleksii Sylichenko 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 two additional commits since the last revision:

 - Merge branch 'openjdk:master' into idea-plugin-update-readme-default-settings
 - Update README.md
   
   Update menu item location to open default settings window.

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

Changes:
  - all: https://git.openjdk.org/jtreg/pull/247/files
  - new: https://git.openjdk.org/jtreg/pull/247/files/63805982..05f0fd2f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jtreg&pr=247&range=01
 - incr: https://webrevs.openjdk.org/?repo=jtreg&pr=247&range=00-01

  Stats: 81 lines in 3 files changed: 79 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jtreg/pull/247.diff
  Fetch: git fetch https://git.openjdk.org/jtreg.git pull/247/head:pull/247

PR: https://git.openjdk.org/jtreg/pull/247