feat: support static analyzer with version 260.31.0

[haifeng-li-at-salesforce]

Title

feat: support static analyzer with version 260.31.0

Summary

• Upgrade plugin to work with @komaci/static-analyzer v260.31.0.
• Improve docs with a flat-config CommonJS example for ESLint 9.
• Adjust tests/fixtures to align with analyzer behavior changes and rule expectations.

What issues does this PR fix or reference?

W-17577587

Motivation and Context

• Keeps the plugin current with the latest static analyzer to ensure accurate graph analysis and compatibility with modern LWC toolchains.

Changes

• package.json:
  • Bump version to 1.1.0.
  • Upgrade @komaci/static-analyzer to ^260.31.0.
• README.md:
  • Add eslint.config.js example showing how to extend the plugin in ESLint 9 flat config.
  • Minor formatting improvements.
• tests/fixtures:
  • test/lib/rules/no-expression-contains-module-level-variable-ref.js: add a @wire field in sample to reflect analyzer behavior.
  • test/lib/rules/no-getter-contains-more-than-return-statement.js: switch from wired function to a wired property (record1) to avoid unintended rule violations.
  • test/lib/rules/artifacts-combined-files/helper.js: pass reportUnusedDisableDirectives: false to stabilize test output with ESLint 9.
  • test/lib/rules/artifacts-combined-files/fileUpload/test.js: rephrase comments and annotations to match updated rule expectations.
• yarn.lock: updated due to dependency changes.

Breaking Changes

• None expected. The plugin runtime API is unchanged. Node >=20 requirement remains as before.

[khawkins]

I'm not sure we necessarily want to run this against main. 260 won't be finalized in roll-out until next year, and technically we shouldn't be pulling in 260-specific dependencies until they're available to everyone. We may want to create a separate feature branch for this work, in the meantime.

[ben-zhang-at-salesforce]

looks good