docs: migrate Array2DUtil and BaseUtil javadoc to markdown

src/main/java/com/adventofcode/flashk/common/Array2DUtil.java

@@ -4,11 +4,9 @@ public class Array2DUtil {
 
     private Array2DUtil() {}
 
-    /**
-     * Transposes the given 2D array.
-     * @param array the array to transpose.
-     * @return a new 2D array that is the transpose of the given array.
-     */
+    /// Transposes the given 2D array.
+    /// @param array the array to transpose.
+    /// @return a new 2D char array that is the transpose of the given array.
     public static char[][] transpose(char[][] array) {
         int rows = array.length;
         int cols = array[0].length;
@@ -21,10 +19,8 @@ public static char[][] transpose(char[][] array) {
         return transposedArray;
     }
 
-    /**
-     * Paints the given array.
-     * @param map the array to paint
-     */
+    /// Paints the given 2D array.
+    /// @param map the array to paint.
     public static void paint(char[][] map) {
 
         System.out.println();

src/main/java/com/adventofcode/flashk/common/BaseUtil.java

@@ -13,49 +13,41 @@ public static Integer binaryToDecInteger(String bin) {
 	public static Long binaryToDec(String bin) {
 	    return Long.parseLong(bin, 2);
 	}
-
-	/**
-	 * Converts from hexadecimal to binary.
-	 * <p>
-	 * Any hexadecimal number can be represented with 4 binary digits (<code>6 hex = 0110 bin</code>).
-	 * </p>
-	 * <p>
-	 * Leading zero digits won't be included in the converted number.
-	 * Use {@link #hexToBinaryPadLeft(String)} if they need to be included.
-	 * </p>
-	 * <p>
-	 * 	<b>Examples:</b>
-	 * </p>
-	 * <pre>
-	 * 	BaseUtil.hexToBinary("6") = "110"
-	 * </pre>
-	 * @param hex the hexadecimal code
-	 * @return the translated binary code
-	 * @see #hexToBinaryPadLeft(String)
-	 */
+
+	/// Converts from hexadecimal to binary.
+	///
+	/// Any hexadecimal number can be represented with 4 binary digits (`6 hex = 0110 bin`).
+	///
+	/// Leading zero digits won't be included in the converted number.
+	/// Use [hexToBinaryPadLeft][#hexToBinaryPadLeft(String)] if they need to be included.
+	///
+	/// **Examples:**
+	///
+	/// ```java
+	/// 	BaseUtil.hexToBinary("6") // returns "110"
+	/// ```
+	/// @param hex the hexadecimal code
+	/// @return the translated binary code
+	/// @see #hexToBinaryPadLeft(String)
 	public static String hexToBinary(String hex) {
 	    return new BigInteger(hex, 16).toString(2);
 	}
-
-	/**
-	 * Converts from hexadecimal to binary and adds zero padding at the leading.
-	 * <p>
-	 * Any hexadecimal number can be represented with 4 binary digits (<code>6 hex = 0110 bin</code>).
-	 * </p>
-	 * </p>
-	 * Leading zero digits will be included in the converted number.
-	 * Use {@link #hexToBinary(String)} if they need to be removed from the result.
-	 * </p>
-	 * <p>
-	 * 	<b>Examples:</b> 
-	 * </p>
-	 * <pre>
-	 * 	BaseUtil.hexToBinaryPadLeft("6") = "0110"
-	 * </pre>
-	 * @param hex the hexadecimal code
-	 * @return the translated binary code, it will always have a multiple of 4 digits.
-	 * @see #hexToBinary(String)
-	 */
+
+	/// Converts from hexadecimal to binary and adds zero padding at the leading.
+	///
+	/// Any hexadecimal number can be represented with 4 binary digits (`6 hex = 0110 bin`).
+	///
+	/// Leading zero digits will be included in the converted number.
+	/// Use [hexToBinary][#hexToBinary(String)] if they need to be removed from the result.
+	///
+	/// **Examples:**
+	///
+	/// ```java
+	/// BaseUtil.hexToBinaryPadLeft("6"); // returns "0110"
+	/// ```
+	/// @param hex the hexadecimal code
+	/// @return the translated binary code, it will always have a multiple of 4 digits.
+	/// @see #hexToBinary(String)
 	public static String hexToBinaryPadLeft(String hex) {
 	    String unpaddedBinary = BaseUtil.hexToBinary(hex);
 	    int size = hex.length() * 4;