fix(react): align jsx-key with upstream

[elecmonkey]

Motivation

react/jsx-key currently misses key diagnostics for parenthesized JSX elements in arrays because the TypeScript AST preserves parentheses that ESTree omits.

The rule also ignores file-level @jsx pragmas when recognizing Children.toArray calls and constructing fragment diagnostics. This can produce false positives for custom JSX runtimes and recommend the wrong fragment name.

Changes

• Unwrap parenthesized array elements before checking missing keys, duplicate keys, and key placement relative to spreads.
• Honor file-level @jsx pragmas when recognizing Children.toArray calls and constructing fragment diagnostics.
• Keep the fragment name independently controlled by settings.react.fragment, matching upstream behavior.
• Split upstream and rslint-specific Go coverage and migrate all 57 canonical cases from eslint-plugin-react@7.37.5.
• Add regression coverage for parenthesized elements, pragma precedence, diagnostic locations, and combined options.