Extend "Code intentions"

[GhostInTheSteiner]

The code intentions for Consulo don't live up to their counterparts in other Jetbrains Products such as Rider. Those are all options (even though more intentions apparently work):

This is just a one-person project for the most part, so I'll restrict myself to a few intentions that are still lacking and that I personally consider important.

Create Class intentions:

Options:

1. In another file (by default in the same folder, if possible open a dialog and allow the user to select the directory)
2. In the same file

Create constructor intentions:

Allow the creation of a constructor on the ScriptLineParser class. Also allow overloads of the constructor.

Create handler method intention

Also allow the generation of an actual handler method like in Visual Studio:

Bonus points if the cursor doesn't need to be on the highlighted word for the tip to show up.

See this:

(cursor is placed on the method name "Test3", just not visible)

(cursor is placed on the class name "Test")

[GhostInTheSteiner]

Issue was splitted into three parts by request of the developer