feat(core): parse-parity suite for acorn parser (T6d)

[vanceingalls]

Summary

• Adds gsapParserAcorn.full.test.ts — 60 passing tests that run the full parse scenario suite from gsapParser.test.ts against parseGsapScriptAcorn
• Fixes a bug in gsapParserAcorn.ts: object-array keyframe percentage calculation had cumulative/percentage order swapped vs recast (fix: add duration before computing percentage, matching recast behavior)
• 4 tests are it.skip'd — write-path cases already covered by gsapWriter.acorn.test.ts
• Stacked on T6c (magic-string write path)

Coverage added

Parse scenarios ported from gsapParser.test.ts:

• Basic .to() / .from() / .set() / .fromTo() parsing
• resolvedStart position resolution (relative, absolute, implicit, chained)
• Timeline defaults inheritance
• Property group classification
• Stagger / yoyo / repeat round-trips
• Unresolvable value round-trips
• Variable-target resolution (querySelector, getElementById, querySelectorAll)
• Array targets, chained tween calls, gsap.utils.toArray
• Lexical scoping, forEach/map callback targets
• Native GSAP keyframes (percentage, object-array, simple-array, three-level easing)

Test plan

• bunx vitest run packages/core/src/parsers/gsapParserAcorn.full.test.ts → 60 pass, 4 skip
• bunx vitest run packages/core/src/parsers/gsapParser.acorn.test.ts packages/core/src/parsers/gsapWriter.acorn.test.ts → 35 pass (T6b + T6c unaffected)

🤖 Generated with Claude Code

[vanceingalls]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• feat(core): parse-parity suite for acorn parser (T6d) #1370 👈 (View in Graphite)
• feat(core): acorn GSAP write path — magic-string offset-splice (T6c) #1369
• feat(core): acorn GSAP read path with T6b differential corpus tests #1368
• main

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