chore: Ignore .zed settings dir (#1337)

## Which issue does this PR close?

None

## What changes are included in this PR?

I'm currently using `zed` (it's great, I highly recommend it!). 

I needed to add the following RA settings:

```json
{
  "rust-analyzer": {
    "linkedProjects": ["./Cargo.toml", "./bindings/python/Cargo.toml"]
  }
}
```

This allows RA to work with the Python bindings as well.

I'm going to add `.zed` to the gitignore file so I don't accidentally
include it.

## Are these changes tested?

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Signed-off-by: Xuanwo <github@xuanwo.io>

Author: Xuanwo

.gitignore

@@ -18,6 +18,7 @@
 target
 .idea
 .vscode
+.zed
 **/.DS_Store
 dist/*
 **/venv