Fix JSX comment duplication in preserve mode

[Copilot]

Fixed an issue where comments adjacent to JSX expressions were duplicated in the output when using jsx: preserve mode.

Problem

When TypeScript compiled JSX with comment-like text content, it would duplicate the comments:

// Input
const jsx = <div>/*pre*/{x}/*post*/</div>;

// Output (broken)
var jsx = <div> /*pre*//*pre*/{x} /*post*//*post*/</div>;

Root Cause

The issue occurred because:

1. JSX text content like /*pre*/ was correctly parsed and emitted as literal text
2. The comment emission logic also detected these patterns as real comments and emitted them separately
3. This resulted in the same content being output twice

Solution

Modified forEachTrailingCommentToEmit in the emitter to add JSX-aware filtering. The fix prevents comment emission when the comment range falls within a JSX text node, avoiding the duplication while preserving all other comment handling behavior.

Verification

• ✅ Test case now produces correct output without duplication
• ✅ All existing JSX-related tests continue to pass (144/144)
• ✅ Broader test suite passing (29,940+ tests)
• ✅ Minimal, targeted change that doesn't affect other functionality

The fix ensures that JSX text content containing comment-like patterns is no longer incorrectly treated as separate comments by the emitter.

Fixes #11.

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