Keep support for evaluating top level form in ignored forms when at top level

[PEZ]

Today I was made aware, by @rafd, that evaluate top-level form “works” when the ignored form is at the top level. This makes sense, but it would also make sense that this should include the ignore marker in the evaluation, and then nothing (or something similar to nothing) should happen. We have actually intended for the latter, but because reasons, this is quite tricky business and we have failed with the intent.

It's likely that some users has started to rely on the current behaviour (at least one has), so I think we should make the current behaviour explicit and intended in the code. It gets important when dealing with issues like these:

• error when slurping forward before commented s-expressions #2387
• Drag sexp forward/backward works unexpectedly when ignore forms are adjacent to form the command is called on #2164

In rangeForDefun when we traverse the forms upwards to find the top level we check for if we are in a comment form and treat that as the top level context.

https://github.com/BetterThanTomorrow/calva/blob/published/src/cursor-doc/token-cursor.ts#L768

I think this probably is the function to deal with this, since it would allow us to figure out the general handling of ignored forms without risking that evaluating top level ignored forms stop working as intended.