WezTerm cursor animation

Add cursor animation when WezTerm supports it.

## Configuration
```lua
config.enable_cursor_animation = true
config.cursor_animation_duration_ms = 150
config.cursor_trail_opacity = 0.4
```

## Upstream Tracking
- Issue: https://github.com/wezterm/wezterm/issues/7387
- PR: https://github.com/wezterm/wezterm/pull/7420