Rework player view UI (#105)

app/src/main/kotlin/it/vfsfitvnm/vimusic/utils/verticalFadingEdge.kt

@@ -0,0 +1,24 @@
+package it.vfsfitvnm.vimusic.utils
+
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawWithContent
+import androidx.compose.ui.graphics.BlendMode
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.graphicsLayer
+
+fun Modifier.verticalFadingEdge() =
+    graphicsLayer(alpha = 0.99f)
+        .drawWithContent {
+            drawContent()
+            drawRect(
+                brush = Brush.verticalGradient(
+                    listOf(
+                        Color.Transparent,
+                        Color.Black, Color.Black, Color.Black,
+                        Color.Transparent
+                    )
+                ),
+                blendMode = BlendMode.DstIn
+            )
+        }