calyx-py: add line numbers to group enables, similar to Dhalia

[ekiwi]

@ayakayorihiro

[ayakayorihiro]

Thanks a lot for this, it's great to see the source mapping here too!! We definitely need a indication of what file the code is coming from... but very exciting!!!!

[rachitnigam]

@ekiwi what needs to be done to get this merged?

[ekiwi]

@ekiwi what needs to be done to get this merged?

There are mainly three blockers:

1. We need to define a way to include the filename in addition to the line number.
2. There is a bug where we end up with two line numbers for a single calyx invoke, I have to spend some time tracking that down.
3. We need to spend some more time thinking about which calyx constructs should be annotated.

1+3 could be addressed in a future PR. 2 definitely has to be fixed before I am going to move this out of draft.

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