Fix various fuzzer-caught crashes in the parser

[jakebailey]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes several parser bugs discovered through fuzz testing, primarily related to edge cases in JSDoc comment parsing and improved await using declaration handling.

• Adds bounds checking to prevent panics when parsing malformed or truncated input
• Improves @overload and @satisfies JSDoc tag support for getter/setter accessors and shorthand properties
• Fixes index tracking in list parsing to correctly handle reparsed elements
• Enhances fuzz testing coverage by seeding with compiler test cases

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
internal/parser/utilities.go	Adds bounds checking to prevent out-of-bounds access when filtering JSDoc comment ranges for short comments
internal/parser/reparser.go	Adds support for @overload tags on getter/setter accessors, fixes @type tag handling for expressions that may be nil, and properly handles @satisfies tags on shorthand property assignments
internal/parser/parser.go	Improves await using declaration detection, adds bounds check to skipTo function, and fixes list element index tracking to account for reparsed items
internal/parser/jsdoc.go	Prevents crash when parsing @typedef tags with no property tags by using fallback position
internal/ast/parseoptions.go	Exports JSX and Force fields to make them accessible from test package
internal/parser/parser_test.go	Converts to external test package, adds comprehensive fuzz test seeding from compiler test cases, and adds helper to parse multi-file test units
internal/parser/testdata/fuzz/FuzzParser/*	Adds fuzz test corpus entries that triggered the fixed bugs

[Copilot]

The comment "This differs from Strada" is unclear. "Strada" is not a term defined in this codebase. This should reference the TypeScript source or be more descriptive about why this differs from the reference implementation.

Suggested change

	// !!! This differs from Strada but prevents a crash
	// Note: This diverges from the TypeScript reference implementation (see src/compiler/parser.ts, parseTypedefTag).
	// In TypeScript, the typeExpression is not always replaced with a JSDocTypeLiteral here, but in this Go port,
	// we assign typeExpression to a new JSDocTypeLiteral to prevent a potential crash when jsdocPropertyTags are present.