naver / billboard.js / 23290058493

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refactor(resolver): split monolithic resolvers into per-type modules (#4115)

Split shape.ts (30+ static imports, 20 resolver functions) into
individual resolver files grouped by chart type dependency:
- Arc types (pie, donut, gauge, polar, funnel) - no axis dependency
- Radar - partial axis dependency (eventrect only)
- Axis types (line, area, bar, bubble, candlestick, scatter, treemap)
- Shared helpers (arc.helpers.ts, axis.helpers.ts)

Split interaction.ts into 3 individual files (selection, subchart, zoom).

This enables bundlers to tree-shake unused chart types from ESM builds.
Previously, importing any single type pulled all 30+ shape/axis modules.

Co-authored-by: Jae Sung Park <jaesung.park@navercorp.com>

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