Apply smart defaults to project creation wizard

[akaroml]

There are just too many steps when using the command Spring Initializr: Create a Maven Project... directly. There are even more steps when the action is triggered by the project explorer.

Please apply default values to get rid of some.

Default to the LTS version?

Default to Java should be fine in most cases

GroupID + ArtifactiID as one input to remove 1 step

Default to JAR should be fine since most cases are JAR for spring boot apps in most cases.

Here we can be smart by detecting the JDK version user already installed. Use the latest LTS if multiple is installed

And consider adding a user setting like "enableSmartDefaults" with auto (defaults to true), true, false, as our safety net. Also, this can be a nice experiment to see the getting through rate of users in different groups (smart default on and off)