Adds `coder secret import <file>` to bulk-import dotenv, JSON, or YAML
secrets through the existing batch API. The command infers the format
from the extension or accepts `--input-format`, supports non-interactive
stdin, validates files locally before upload, and warns when imported
keys cannot be injected as environment variables.
Reviewed and updated by Coder Agents on behalf of @dylanhuff-at-coder.
