Clean up "Running Your First Java Application"

[danthe1st]

Now that IDE articles have been added, the "Running Your First Java Application" section contains 6 articles which may be a bit overwhelming. After all, does it really make sense to let people read through 6 articles about their "First Java Application"? Having a list of articles explaining what's necessary for the "First Java Application" is not giving people motivation to use that programming language.

In order to do this, I have the following suggestions:

• Group the IDE articles to their own article series/tutorial group and keep one link to that tutorial group in the "Running Your First Java Application" section. The short description shown on /learn should tell developers that using an IDE makes writing Java applications easier. I also mentioned this in Eclipse article #77 and similar.
• Move Jshell - The Java Shell Tool to a later section like "Getting to know the JVM". Beginners typically don't use jshell. While that tool may be good for demonstration, people starting with Java want to write programs (I think). Trying jshell is probably just confusing. Also, once the new On-Ramp features are finalized, there is even less of a reason for beginners to use jshell as they can experiment with a very simple source code file. Once that is done, it might be a good idea to update Getting Started with Java and/or Launching Single-File Source-Code Programs.

This is a restructuring suggestion similar to #54.