Support Markdown Documentation Comments (JEP 467, JDK 23)

[odenix]

Consider the following code:

import java.nio.ByteBuffer;

interface BufferAllocator {
  /// Returns a lease for a [ByteBuffer] with at least the specified [capacity][ByteBuffer#capacity].
  LeasedByteBuffer getByteBuffer(long minCapacity);
}

Formatting the above code causes the following issues:

1. The doc comment is split into two lines, but the second line starts with // instead of ///.
2. The import statement is removed, breaking the links.

Disabling Javadoc formatting doesn't prevent either issue.
The only workaround I could find was to disable google-java-format.

Tested with JDK 23 and google-java-format 1.24.0.