CodeActionProvider should support body expression constructor with new action: Initialize body expression ctor from properties

[bard83]

Body expression constructor is currently not supported as already mentioned in #56. Since all the others code actions have been removed, it does make sense to provide a new action to initialize the ctor - as body expression - from the properties.

New Action:

• Initialize body expression ctor from properties

possible body expression constructors:

public NewClass (int field1) => Field1 = field1;

public Field1 { get; set; }

public NewClass (int field1, int field2) => (Field1, Field2) = (field1, field2);

public Field1 { get; set; }

Left literals could be prefixed with this. or _.

[bard83]

closed by #125