chore: create a release script for the Rust CLI (#1479)

This is a stopgap solution before migrating the build for the npm
release to GitHub Actions (which is ultimately what should be done to
ensure hermetic builds).

The idea is that instead of continuing to create PRs like
https://github.com/openai/codex/pull/1472 where I have to check in a
change to the `WORKFLOW_URL`, this script uses `gh run list` to get the
`WORKFLOW_URL` dynamically and then threads the value through to
`install_native_deps.sh`.

To create the 0.3.0 release on npm, I ran:

```shell
./codex-cli/scripts/stage_rust_release.py --release-version 0.3.0
```

and then did `npm publish --dry-run` followed by `npm publish` in the
temp directory created by `stage_rust_release.py`.

codex-cli/scripts/install_native_deps.sh

@@ -8,7 +8,7 @@
 # the native implementation when users set CODEX_RUST=1.
 #
 # Usage
-#   install_native_deps.sh [RELEASE_ROOT] [--full-native]
+#   install_native_deps.sh [--full-native] [--workflow-url URL] [CODEX_CLI_ROOT]
 #
 # The optional RELEASE_ROOT is the path that contains package.json.  Omitting
 # it installs the binaries into the repository's own bin/ folder to support
@@ -20,32 +20,43 @@ set -euo pipefail
 # Parse arguments
 # ------------------
 
-DEST_DIR=""
+CODEX_CLI_ROOT=""
 INCLUDE_RUST=0
 
-for arg in "$@"; do
-  case "$arg" in
+# Until we start publishing stable GitHub releases, we have to grab the binaries
+# from the GitHub Action that created them. Update the URL below to point to the
+# appropriate workflow run:
+WORKFLOW_URL="https://github.com/openai/codex/actions/runs/15981617627"
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
     --full-native)
       INCLUDE_RUST=1
       ;;
+    --workflow-url)
+      shift || { echo "--workflow-url requires an argument"; exit 1; }
+      if [ -n "$1" ]; then
+        WORKFLOW_URL="$1"
+      fi
+      ;;
     *)
-      if [[ -z "$DEST_DIR" ]]; then
-        DEST_DIR="$arg"
+      if [[ -z "$CODEX_CLI_ROOT" ]]; then
+        CODEX_CLI_ROOT="$1"
       else
-        echo "Unexpected argument: $arg" >&2
+        echo "Unexpected argument: $1" >&2
         exit 1
       fi
       ;;
   esac
+  shift
 done
 
 # ----------------------------------------------------------------------------
 # Determine where the binaries should be installed.
 # ----------------------------------------------------------------------------
 
-if [[ $# -gt 0 ]]; then
+if [ -n "$CODEX_CLI_ROOT" ]; then
   # The caller supplied a release root directory.
-  CODEX_CLI_ROOT="$1"
   BIN_DIR="$CODEX_CLI_ROOT/bin"
 else
   # No argument; fall back to the repo’s own bin directory.
@@ -62,10 +73,6 @@ mkdir -p "$BIN_DIR"
 # Download and decompress the artifacts from the GitHub Actions workflow.
 # ----------------------------------------------------------------------------
 
-# Until we start publishing stable GitHub releases, we have to grab the binaries
-# from the GitHub Action that created them. Update the URL below to point to the
-# appropriate workflow run:
-WORKFLOW_URL="https://github.com/openai/codex/actions/runs/15981617627"
 WORKFLOW_ID="${WORKFLOW_URL##*/}"
 
 ARTIFACTS_DIR="$(mktemp -d)"