Unset simple_io and toplevel_anonymous_class (#21)

* Update division.md

* Add basic feature flags impl

* Integrate String challenges

Fix script to not make an out.json

Co-Authored-By: alphaBEE <61616007+ankitsmt211@users.noreply.github.com>

* Remove "float point"

* Fix mdlint complaints

* Turn off simpleio and toplevel anon

---------

Co-authored-by: alphaBEE <61616007+ankitsmt211@users.noreply.github.com>

Author: bowbahdoe

book.toml

@@ -13,8 +13,8 @@ mathjax-support = true
 [preprocessor.features]
 command = "python3 features.py"
 # Not ready
-toplevel_anonymous_class = true
+toplevel_anonymous_class = false
 # Not ready
-simple_io = true
+simple_io = false
 # Turn on when Java 21 released
 java_21 = false