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_linux/Cargo.toml

@@ -66,7 +66,7 @@ itertools.workspace = true
 libc.workspace = true
 log.workspace = true
 parking_lot.workspace = true
-pathfinder_geometry = "0.5"
+pathfinder_geometry.workspace = true
 pollster.workspace = true
 profiling.workspace = true
 smallvec.workspace = true
@@ -86,7 +86,7 @@ raw-window-handle.workspace = true
 
 # Used in both windowing options
 ashpd = { workspace = true, optional = true }
-swash = { version = "0.2.6" }
+swash.workspace = true
 bitflags = { workspace = true, optional = true }
 filedescriptor = { version = "0.8.2", optional = true }
 open = { version = "5.2.0", optional = true }