refactor: align List tokens, spacing and typography with MD3

[adam-sajko]

Motivation

List.Item and List.Accordion now follow the MD3 list spec for padding, type, and colour instead of hardcoded sizes and the old expanded primary tint.

Visual changes

• One-line rows: 16dp vertical padding (was 14). Height 56dp.
• Two-line rows: 14dp vertical padding. Height 72dp.
• Three-line rows: 12dp vertical padding when the description wraps. Height 88dp.
• Title is bodyLarge, supporting text is bodyMedium (line height 24 / 20).
• Trailing inset 16dp (was 24). Checkboxes and chevrons sit 8dp closer to the edge.
• Expanded accordion title and leading icon stay onSurface / onSurfaceVariant (no primary tint).

Related issue

Related to #4976

Test plan

• Unit tests for the theme override reaching title/description typography
• Unit tests for 12dp padding when the description wraps
• Snapshots updated on purpose (padding, type, trailing inset)

[MikitasK]

good job 👏 overall, this refactoring looks solid 👍
just a few thing to consider before merge:

[MikitasK]

LGTM ✅