[leeshengis]

Fixes #2997.

Summary

• Ignore apparent wildcard imports inside Java text blocks, strings, character literals, and comments.
• Account for Unicode escapes when locating literal/comment boundaries, while retaining the original source text and physical line numbers in diagnostics.
• Keep the existing import pattern and identity formatting behavior, without adding runtime dependencies.
• Add 17 tests covering regressions and serialization/equality, and update all three required changelogs.

Validation

Tested in an isolated Linux environment with Temurin 21, compiling to the project's Java 17 target:

• :lib:test and :testlib:test: 491 passed, 11 skipped by existing test conditions, no failures (JUnit XML counts).
• ForbidWildcardImportsStepTest: all 19 tests pass; the same tests against the original implementation produce 10 failures.
• Gradle plugin wildcard-import tests: 2 passed, including toggle support.
• Maven plugin wildcard-import tests: 2 passed, including aggregation across files.
• Full spotlessCheck, :lib:spotbugsMain, :testlib:spotbugsMain, and git diff --check: passed.

The full cross-platform/JDK CI matrix has not been run locally. The first plugin-test attempt hit a Gradle distribution-download timeout and one Maven invocation returned no captured stdout. All four integration tests passed on an unchanged rerun after preparing the dependencies. Local cache/proxy routing was configured outside the checkout.

AI assistance

AI tools assisted with the implementation, regression tests, review, and local verification. This PR is opened as a draft for maintainer review.