ui(motion): bring SDUI tree onto QueryaMotion tokens (#479)

[ZhuchkaTriplesix]

Summary

• SDUI expand chevron uses context.motionDuration(QueryaMotion.fast) + motionCurve(standardCurve) — same dialect as PG/MySQL/SQLite trees.
• Dropped hardcoded Duration(160ms) / Curves.easeOutCubic and Material IconButton for a native-tree-style chevron.
• Motion Off verified: AnimatedRotation.duration == Duration.zero.
• No QueryaAnimatedExpand on the flat virtualized row list (incompatible); noted in code comments → ui(motion): unify tree expand chevron and height choreography #480 for expand clock unification.

Test plan

• flutter test test/core/sdui/sdui_builders_test.dart
• Visual: extension driver tree chevron matches SQL trees
• Motion Off: expand is instant

Closes #479