Closes https://github.com/zed-industries/zed/issues/21277
To the left is current Zed, right is the improved version.
3rd message, from Zed, to resolve the item, does not have `textEdit` on
the right side, and has one on the left.
Seems to not influence the end result though, but at least Zed behaves
more appropriate now.
<img width="1727" alt="image"
src="https://github.com/user-attachments/assets/ca1236fd-9ce2-41ba-88fe-1f3178cdcbde"
/>
Instead of modifying the original LSP completion item, store completion
list defaults and apply them when the item is requested (except `data`
defaults, needed for resolve).
Now, the only place that can modify the completion items is this method,
and Python impl seems to be the one doing it:
ca9c3af56f/crates/languages/src/python.rs (L182-L204)
Seems ok to leave untouched for now.
Release Notes:
- Fixed LSP completion items modified before resolve request
8a7a78fafb