fix: use more appropriate snacks picker

[nmiguel]

Currently, debugprint uses the function snacks.picker.grep to find usages of "DEBUGPRINT" (or other custom print markers). In my opinion this is not the most appropriate picker offered by snacks.
The reason for this is that picker.grep simply writes DEBUGPRINT into a grep picker as if it were user input, while picker.grep_word preloads the grep picker with a given string in a separate way.

This is important since, in the current version, if a user opens the picker for debugprints and wants to match a given file, they first need to complete the rest of the input starting from the end of the debugprint marker. (see imgs 1 and 2).

This is the naive search, user opened the debug prints picker and wrote debug (to match the file). No results shown as the prompt starts from DEBUGPRINT.

This search correctly retrieves results, but requires the user start with a wildcard.

This final image is the different function that is present in the PR, not only is it displayed differently by Snacks itself, such that the debugprint marker can't be deleted, but even a naive search (like img 1) displays results as the debugprint marker and the user expression are evaluated separately. Do note that if the user has smart-case enabled (such as my case), it will now match lower-case strings, as apparently the smart-case is not triggered by the upper-case debugprint marker.

Let me finish by saying that I love this plugin and I use it daily, this is just a minor nitpick that I have and wanted to fix for myself, and decided to open a PR for it in case you find it useful. If there's anything I need to change to get this merged let me know, and if for some reason you don't find this PR useful feel free to close it. Thanks!

[andrewferrier]

Hi - thanks for the input. Will need to revisit this in a few days once I have the bandwidth to take a proper look but on the face of it this sounds like a positive improvement to me. Thanks for taking the time.

[andrewferrier]

I've tested this locally and it works well, thank you - all merged!

[andrewferrier]

Thanks - I've merged this now. Works well - thanks for the improvement!