docs(linter): prefer enum docs over struct field docs for no-unused-vars

[Boshen]

Summary

• Remove duplicated documentation from struct field comments that was already present on enum variants
• Add missing docs to CaughtErrorsJson enum variants
• Update website docs snapshot

Closes #17937

Test plan

• cargo test -p oxc_linter -- no_unused_vars passes
• cargo test -p website_linter passes

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR refactors documentation for the no-unused-vars linter rule by moving enum variant descriptions from struct field comments to the enum variants themselves, eliminating duplication.

Changes:

• Removed duplicated documentation from three struct fields (vars, args, caught_errors) that described enum variant behavior
• Added missing documentation to CaughtErrorsJson enum variants (All and None)
• Updated website documentation snapshot to reflect the new documentation structure with variant-specific sections

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
crates/oxc_linter/src/rules/eslint/no_unused_vars/options.rs	Removed redundant struct field documentation and added missing docs to CaughtErrorsJson enum variants
tasks/website_linter/src/rules/snapshots/docs_rule_pages.snap	Updated to show individual variant documentation sections instead of aggregated descriptions

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codspeed-hq]

Merging this PR will not alter performance

✅ 4 untouched benchmarks
⏩ 41 skipped benchmarks¹

---

_{Comparing docs/no-unused-vars-dedupe-enum-docs (799b1c8) with main (a89b245)²}

Footnotes

1. 41 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (8d292b7) during the generation of this report, so a89b245 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[connorshea]

Merge activity

• Jan 17, 6:22 PM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Jan 17, 6:22 PM UTC: connorshea added this pull request to the Graphite merge queue.
• Jan 17, 6:28 PM UTC: Merged by the Graphite merge queue.