docs: add javadocs for nearly everything

src/main/java/eu/midnightdust/yaytris/game/TetrominoShape.java

@@ -5,39 +5,38 @@ import java.awt.Color;
 public enum TetrominoShape {
     SQUARE(new int[][]{
         {1, 1},
-        {1, 2}
+        {1, 1}
     }, Color.YELLOW),
     LINE(new int[][]{
         {1},
-        {2},
+        {1},
         {1},
         {1}
     }, Color.BLUE),
     T(new int[][]{
         {0, 1, 0},
-        {1, 2, 1}
+        {1, 1, 1}
     }, Color.RED),
     L_LEFT(new int[][]{
         {0, 1},
-        {0, 2},
+        {0, 1},
         {1, 1}
     }, Color.MAGENTA),
     L_RIGHT(new int[][]{
         {1, 0},
-        {2, 0},
+        {1, 0},
         {1, 1}
     }, Color.GREEN),
     ZAP_LEFT(new int[][]{
         {0, 1},
-        {1, 2},
+        {1, 1},
         {1, 0}
     }, Color.CYAN),
     ZAP_RIGHT(new int[][]{
         {1, 0},
-        {2, 1},
+        {1, 1},
         {0, 1}
     }, Color.ORANGE);
-    ;
 
     final int[][] boundary;
     final Color color;