[aot repositories] provide go to definition support

[martinlippert]

You have a repository definition and the source code of the AOT-generated implementation for that repository.

The go to definition functionality (when invoked on the query method in the repository or the repository definition itself) should then take you directly to the generated source code for that repository. This has two use cases in mind:

• users can easily jump to the generated source code and see what got generated
• users can set breakpoints in there to see what is happening when aot-generated repository code is being executed

Maybe we need an additional code lens for this that visualizes this functionality, so that users can easily see that they can jump to the aot-generated implementation by clicking on the code lens.

[BoykoAlex]

@martinlippert I'm not sure about the breakpoint... The generated sources are in the folder which is not "source folder"📁 I think the folder should really become a source folder to be able to put a breakpoint... Anyway, i need to investigate the breakpoint part of this.

The navigation to the generated source is merged via 5c50917