chore: merge git crates (#5909)

Merge `git-apply` and `git-tooling` into `utils/`

codex-rs/protocol/Cargo.toml

@@ -11,7 +11,7 @@ path = "src/lib.rs"
 workspace = true
 
 [dependencies]
-codex-git-tooling = { workspace = true }
+codex-git = { workspace = true }
 
 base64 = { workspace = true }
 codex-utils-image = { workspace = true }

codex-rs/protocol/src/models.rs

@@ -11,7 +11,7 @@ use serde::ser::Serializer;
 use ts_rs::TS;
 
 use crate::user_input::UserInput;
-use codex_git_tooling::GhostCommit;
+use codex_git::GhostCommit;
 use codex_utils_image::error::ImageProcessingError;
 use schemars::JsonSchema;