feat: split codex-common into smaller utils crates (#11422)

We are removing feature-gated shared crates from the `codex-rs`
workspace. `codex-common` grouped several unrelated utilities behind
`[features]`, which made dependency boundaries harder to reason about
and worked against the ongoing effort to eliminate feature flags from
workspace crates.

Splitting these utilities into dedicated crates under `utils/` aligns
this area with existing workspace structure and keeps each dependency
explicit at the crate boundary.

## What changed

- Removed `codex-rs/common` (`codex-common`) from workspace members and
workspace dependencies.
- Added six new utility crates under `codex-rs/utils/`:
  - `codex-utils-cli`
  - `codex-utils-elapsed`
  - `codex-utils-sandbox-summary`
  - `codex-utils-approval-presets`
  - `codex-utils-oss`
  - `codex-utils-fuzzy-match`
- Migrated the corresponding modules out of `codex-common` into these
crates (with tests), and added matching `BUILD.bazel` targets.
- Updated direct consumers to use the new crates instead of
`codex-common`:
  - `codex-rs/cli`
  - `codex-rs/tui`
  - `codex-rs/exec`
  - `codex-rs/app-server`
  - `codex-rs/mcp-server`
  - `codex-rs/chatgpt`
  - `codex-rs/cloud-tasks`
- Updated workspace lockfile entries to reflect the new dependency graph
and removal of `codex-common`.

codex-rs/tui/src/lib.rs

@@ -8,8 +8,6 @@ use app::App;
 pub use app::AppExitInfo;
 pub use app::ExitReason;
 use codex_cloud_requirements::cloud_requirements_loader;
-use codex_common::oss::ensure_oss_provider_ready;
-use codex_common::oss::get_default_model_for_oss_provider;
 use codex_core::AuthManager;
 use codex_core::CodexAuth;
 use codex_core::INTERACTIVE_SESSION_SOURCES;
@@ -41,6 +39,8 @@ use codex_protocol::protocol::RolloutItem;
 use codex_protocol::protocol::RolloutLine;
 use codex_state::log_db;
 use codex_utils_absolute_path::AbsolutePathBuf;
+use codex_utils_oss::ensure_oss_provider_ready;
+use codex_utils_oss::get_default_model_for_oss_provider;
 use cwd_prompt::CwdPromptAction;
 use cwd_prompt::CwdSelection;
 use std::fs::OpenOptions;
@@ -156,7 +156,7 @@ pub async fn run_main(
     // gpt-oss:20b) and ensure it is present locally. Also, force the built‑in
     let raw_overrides = cli.config_overrides.raw_overrides.clone();
     // `oss` model provider.
-    let overrides_cli = codex_common::CliConfigOverrides { raw_overrides };
+    let overrides_cli = codex_utils_cli::CliConfigOverrides { raw_overrides };
     let cli_kv_overrides = match overrides_cli.parse_overrides() {
         // Parse `-c` overrides from the CLI.
         Ok(v) => v,