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_wgpu/Cargo.toml

@@ -21,14 +21,14 @@ anyhow.workspace = true
 bytemuck = "1"
 collections.workspace = true
 cosmic-text = "0.19.0"
-etagere = "0.2"
+etagere.workspace = true
 itertools.workspace = true
 log.workspace = true
 parking_lot.workspace = true
 profiling.workspace = true
 raw-window-handle.workspace = true
 smallvec.workspace = true
-swash = "0.2.6"
+swash.workspace = true
 unicode-segmentation.workspace = true
 gpui_util.workspace = true
 wgpu.workspace = true