feat: Added working Cat

Made Base, Echo match assignment.

Added Cat.java

Took bin/ out of git


# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# On branch main
# Changes to be committed:
#	modified:   .gitignore
#	deleted:    app/bin/main/application/Base.class
#	deleted:    app/bin/main/application/Echo.class
#	modified:   app/src/main/java/application/Base.java
#	new file:   app/src/main/java/io/Cat.java
#	renamed:    app/src/main/java/application/Echo.java -> app/src/main/java/io/Echo.java
#
