meta(vscode): Run rust-analyzer with all features

[szokeasaurusrex]

So that rust-analyzer also analyzes feature-flag-guarded portions of code when using VSCode/Cursor.

#skip-changelog

[szokeasaurusrex]

Feel free to close if you don't want this – I noticed the potential improvement while reviewing #899

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.46%. Comparing base (750dec0) to head (578f3cd).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #902   +/-   ##
=======================================
  Coverage   73.46%   73.46%           
=======================================
  Files          64       64           
  Lines        7518     7518           
=======================================
  Hits         5523     5523           
  Misses       1995     1995           

[lcian]

Nice thanks @szokeasaurusrex, should we enable all features directly? Any downside of doing so?
https://users.rust-lang.org/t/how-to-turn-on-all-or-specified-features-of-a-crate-during-development/93672/2

[lcian]

In fact, I do enable the features I need locally for development directly in Cargo.toml (because I use neovim, I will try if it's compatible with this editorconfig config, but I suspect this one wouldn't work)
Sorry this is not even editorconfig this is vscode so it won't work for me for sure.
But it can be helpful for people that use vscode

[szokeasaurusrex]

@lcian we could also enable all features. I am not aware of any downsides of doing so

[lcian]

I guess rust-analyzer will be a bit slower, but I think it makes sense to enable all features