Adjust how fieldAsText method in Config handles optional values

[SonarBeserk]

When attempting to display the config currently you seen an exception related to the use of field.get() in this method. This change instead casts the field as an optional value and gets the string value of the optional.

Due to

Essential-Commands/ec-core/src/main/java/dev/jpcode/eccore/config/Config.java

Line 63 in 03c32d0

((Option<?>) field.get(this)).loadAndSave(props);

only Optionals are supported in the config at this point. If that ever changes it may make sense to type check the fields like mentioned at https://stackoverflow.com/a/2262639

[John-Paul-R]

Seems this slipped through the cracks when I introduced the Option class. Good catch, and thanks for the fix!

I appreciate the link to the relevant stackoverflow as well 👍