This change adds support for a `@note` tag and enhanced custom tags to Java API documentation.
Refer to [the JEP](https://bugs.openjdk.org/browse/JDK-8363700) and other associated JBS issues for details. --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - Refine edge cases - Make sure all note ids are unique - Add custom tag allowed locations test - Improve note ids, add tests - Clean up handling of custom note tag names - Undo unrelated DocFinder and InheritableTaglet changes - Clean up Simple/BaseTaglet constructors - Add Markdown support and tests - Merge branch 'master' into note-tag - Change doclint error to warning - ... and 37 more: https://git.openjdk.org/jdk/compare/87fdbc5b...418bffd6 Changes: https://git.openjdk.org/jdk/pull/28358/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28358&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8358754 Stats: 2174 lines in 42 files changed: 1940 ins; 112 del; 122 mod Patch: https://git.openjdk.org/jdk/pull/28358.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/28358/head:pull/28358 PR: https://git.openjdk.org/jdk/pull/28358
