Breakpoints for lambdas.

[lahodaj]

This is a draft/prototype incorporating apache/netbeans#9285 into the extension, for testing purposes. It adds an ability to put breakpoints in individual lambdas. Internally, the lambdas are identified by the sequence number on their (starting) line. Please look at the NB PR for some details.

In VS Code, it may look like:

Please see also #64.

[sid-srini]

Thanks a lot @lahodaj. This is a much needed feature.

One minor nit: please rename the patch file to something like 9285-draft.diff so that we may easily track the upstream PR. Thanks.

[Achal1607]

Thanks @lahodaj, I’ve done an overview review, and it looks good to me as an initial patch. This is an important feature.