* feat: enhance API spec export with environment variables support
- Updated `exportApiSpec` function to accept and process environment variables for multi-server exports.
- Added logic to convert environment variables into a structured format for OpenAPI server entries.
- Enhanced the `CreateApiSpec` component to include environments in the exported YAML content.
- Introduced unit tests to validate the handling of server variables and their integration into the exported API specifications.
* refactor: streamline API spec export logic and improve variable handling
- Simplified variable extraction in `exportApiSpec` by directly assigning capture groups.
- Updated URL interpolation to use request variables instead of global variables for better accuracy.
- Enhanced handling of request body types by replacing early returns with breaks for clearer flow control.
- Adjusted tests to ensure backward compatibility with OpenAPI specifications and server variable handling.
* refactor: improve variable handling and URL processing in OpenAPI exporters
- Streamlined server variable assignment in `exportApiSpec` to handle undefined values more gracefully.
- Enhanced URL path extraction to ensure leading slashes are preserved in `getDefaultUrl` and `extractServerVars`.
- Updated string replacement logic to use `replaceAll` for consistent variable substitution in URLs.
