zed: Unify dependencies (#61381)

# Objective

Unify dependencies inside of the root `Cargo.toml` to prevent versions
from going out of sync and creating copies of dependencies.

## Testing

- All tests pass, nothing touches the `Cargo.lock`

## Review

Review is easiest by going through commit by commit.

Release Notes:

- N/A or Added/Fixed/Improved ...

crates/gpui_windows/Cargo.toml

@@ -25,7 +25,7 @@ accesskit_windows.workspace = true
 anyhow.workspace = true
 collections.workspace = true
 dunce.workspace = true
-etagere = "0.2"
+etagere.workspace = true
 futures.workspace = true
 gpui_util.workspace = true
 image.workspace = true