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_macos/Cargo.toml

@@ -25,23 +25,23 @@ gpui.workspace = true
 accesskit.workspace = true
 accesskit_macos.workspace = true
 anyhow.workspace = true
-async-task = "4.7"
-block = "0.1"
+async-task.workspace = true
+block.workspace = true
 block2.workspace = true
 cocoa.workspace = true
 collections.workspace = true
 core-foundation.workspace = true
 core-foundation-sys.workspace = true
-core-graphics = "0.24"
-core-text = "21"
+core-graphics.workspace = true
+core-text.workspace = true
 core-video.workspace = true
 ctor.workspace = true
 derive_more.workspace = true
 dispatch2 = "0.3.1"
-etagere = "0.2"
+etagere.workspace = true
 # WARNING: If you change this, you must also publish a new version of zed-font-kit to crates.io
 font-kit = { git = "https://github.com/zed-industries/font-kit", rev = "94b0f28166665e8fd2f53ff6d268a14955c82269", package = "zed-font-kit", version = "0.14.1-zed", optional = true }
-foreign-types = "0.5"
+foreign-types.workspace = true
 futures.workspace = true
 gpui_util.workspace = true
 image.workspace = true
@@ -57,7 +57,7 @@ objc2-app-kit.workspace = true
 objc2-foundation.workspace = true
 objc2-user-notifications.workspace = true
 parking_lot.workspace = true
-pathfinder_geometry = "0.5"
+pathfinder_geometry.workspace = true
 raw-window-handle.workspace = true
 semver.workspace = true
 smallvec.workspace = true
@@ -65,7 +65,7 @@ strum.workspace = true
 uuid.workspace = true
 
 [target.'cfg(target_os = "macos")'.build-dependencies]
-cbindgen = { version = "0.28.0", default-features = false }
+cbindgen.workspace = true
 gpui.workspace = true
 
 # When this crate is itself being tested (cargo test -p gpui_macos), its own