RFR: 8365491: VSCode IDE: add basic configuration for the Oracle Java extension [v3]

[Manuel Hässig]

> This PR adds a basic configuration for the [Oracle Java VSCode extension](https://marketplace.visualstudio.com/items?itemName=Oracle.oracle-java) to the `vscode-project-*` targets.

Manuel Hässig has updated the pull request incrementally with one additional commit since the last revision:

  Enable nbjavac

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26759/files
  - new: https://git.openjdk.org/jdk/pull/26759/files/277a590d..bfa9d40c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26759&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26759&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26759.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26759/head:pull/26759

PR: https://git.openjdk.org/jdk/pull/26759