chore: Move workspace dependencies to workspace.dependencies (#7454)

We should prefer referring to local deps via `.workspace = true` from
now on.

Release Notes:

- N/A

crates/theme_importer/Cargo.toml

@@ -10,7 +10,7 @@ any_ascii = "0.3.2"
 anyhow.workspace = true
 clap = { version = "4.4", features = ["derive"] }
 convert_case = "0.6.0"
-gpui = { path = "../gpui" }
+gpui.workspace = true
 indexmap = { version = "1.6.2", features = ["serde"] }
 indoc.workspace = true
 log.workspace = true
@@ -23,6 +23,6 @@ serde_json.workspace = true
 serde_json_lenient.workspace = true
 simplelog = "0.9"
 strum = { version = "0.25.0", features = ["derive"] }
-theme = { path = "../theme" }
+theme.workspace = true
 uuid.workspace = true
 vscode_theme = "0.2.0"