feat(example): improve appearance of dark mode filter (#2003)

Author: TechnicJelle

lib/src/layer/tile_layer/tile_builder.dart

@@ -12,26 +12,11 @@ Widget darkModeTilesContainerBuilder(
 ) {
   return ColorFiltered(
     colorFilter: const ColorFilter.matrix(<double>[
-      -1,
-      0,
-      0,
-      0,
-      255,
-      0,
-      -1,
-      0,
-      0,
-      255,
-      0,
-      0,
-      -1,
-      0,
-      255,
-      0,
-      0,
-      0,
-      1,
-      0,
+      //Colors get Inverted and then Hue Rotated by 180 degrees
+      0.5740000009536743, -1.4299999475479126, -0.14399999380111694, 0, 255, //R
+      -0.4259999990463257, -0.429999977350235, -0.14399999380111694, 0, 255, //G
+      -0.4259999990463257, -1.4299999475479126, 0.8559999465942383, 0, 255, //B
+      0, 0, 0, 1, 0, //A
     ]),
     child: tilesContainer,
   );
@@ -46,26 +31,11 @@ Widget darkModeTileBuilder(
 ) {
   return ColorFiltered(
     colorFilter: const ColorFilter.matrix(<double>[
-      -1,
-      0,
-      0,
-      0,
-      255,
-      0,
-      -1,
-      0,
-      0,
-      255,
-      0,
-      0,
-      -1,
-      0,
-      255,
-      0,
-      0,
-      0,
-      1,
-      0,
+      //Colors get Inverted and then Hue Rotated by 180 degrees
+      0.5740000009536743, -1.4299999475479126, -0.14399999380111694, 0, 255, //R
+      -0.4259999990463257, -0.429999977350235, -0.14399999380111694, 0, 255, //G
+      -0.4259999990463257, -1.4299999475479126, 0.8559999465942383, 0, 255, //B
+      0, 0, 0, 1, 0, //A
     ]),
     child: tileWidget,
   );