Javadoc support for referencedLibraries?

If a non-maven/gradle library is added to referencedLibraries config (added by https://github.com/redhat-developer/vscode-java/pull/1196) - it is impossible to add the library's javadoc.

Environment

• Operating System: Tried OSX and Gentoo Linux.
• JDK version: 19
• Visual Studio Code version: 1.76.0
• Java extension version: v0.25.8

Steps To Reproduce

1. Download any library from maven, e.g. https://repo1.maven.org/maven2/com/pelzer/util/pelzer-util/1.9.0/pelzer-util-1.9.0.jar and https://repo1.maven.org/maven2/com/pelzer/util/pelzer-util/1.9.0/pelzer-util-1.9.0-javadoc.jar
2. Delete META-INF/maven from the jar
3. Add two jars as referenced libraries to settings.json
4. Import a class and hover over it or ctrl+click on it. Only bare decompiler structure shows up without documentation.

Current Result

Import a class and hover over it or ctrl+click on it. Only bare decompiler structure shows up without documentation.

Expected Result

Ability to map javadoc jars to libraries to allow for javadoc presentation on hover.

从 referencedLibraries 配置开始，在移除 META-INF/maven 后导入一个类并使用 hover 或 Ctrl+click，以复现缺失的文档。当用户可以将 Javadoc JAR 映射到一个被引用的库，并在 hover 时看到其文档时，即表示完成。