This commit introduces a sophisticated, reusable `AutoScrollingText` composable that provides a polished marquee effect for overflowing text, and applies it to both the full and mini player views.

The `AutoScrollingText` component includes several key refinements based on detailed feedback:

1.  **Animated Left Gradient Color:** To ensure the text is always visible before scrolling, the starting color of the left-side gradient's brush is animated from opaque (`gradientEdgeColor`) to transparent. This correctly creates the effect of the fade appearing only as the scroll begins.
2.  **Static Right Gradient:** The right-side gradient is rendered statically from the start to handle the initial text overflow.
3.  **Synchronized Animations:** The color animation is driven by a state change synchronized with the `initialDelayMillis` of the `basicMarquee` modifier, ensuring a seamless and polished user experience.
4.  **Adjusted Spacing:** The spacing between text repetitions in the marquee has been fine-tuned to `gradientWidth + 6.dp` as requested.

This component has been integrated into both the `PlayerSongInfo` (full player) and `MiniPlayerContentInternal` (mini-player) composables to handle long song titles and artist names, replacing the previous `TextOverflow.Ellipsis` truncation with a more elegant and user-friendly solution across the app.