Material Design 3 linear progress indicator.

Unified component:

• indeterminate: false (default) → determinate, follows value/position
• indeterminate: true → indeterminate animation driven by LinearIndicatorUpdator (Disjoint or Contiguous via type)
• wavy: false (default) renders flat segments via LinearIndicatorShape
• wavy: true renders the active segment(s) as wavy paths via LinearIndicatorWaveShape (M3 expressive)