v0.4.0

Added

• Added gzip-compressed local .csv.gz and .ndjson.gz input support.
• Added gzip-compressed local .ndjson.gz file output support.
• Added compressed NDJSON fixture coverage for localhost Elasticsearch ingestion.
• Added YAML file support for Elasticsearch ingest pipeline and composable index template configuration.
• Added YAML example configs for a Steam games Elasticsearch ingest pipeline and index template.
• Added --version CLI output.
• Added Toon input support for local and remote .toon sources, including ----separated documents and top-level tabular object arrays.

Fixed

• Rejected unsupported gzip input and output suffixes consistently before ingestion or file creation.
• Flushed gzip-compressed file outputs on close so completed .ndjson.gz files are readable immediately.
• Preserved Elasticsearch index template JSON/JSONC fallback parsing when YAML support is enabled.