feat: streaming and large-data support (#18)

[adiled]

• feat: streaming and large-data support

• Existing functions accept sync iterables/generators (+ Float64Array for OHLCV)
• Add async variants resampleOhlcvAsync / resampleTicksByTimeAsync / resampleTicksByCountAsync with out-of-order healing (outOfOrderMs)
• CLI: stream CSV/JSONL/NDJSON files line-by-line, incremental output, new jsonl format
• Changeset (minor), README docs. Closes Add support for streams and large data formats #9.

• feat: parquet file input (async only) and ESM-only package

• chore: keep require() working via CJS wrapper; downgrade to minor

• Add per-record map option; drop parquet alias guessing

• New src/map.ts: OhlcvMap/TickMap (Record form: canonical field -> source key; function form: (record) => IOHLCV/TradeTick) + mapToOhlcv/mapToTick + async-iterable wrappers. Exported from index.
• Library: resampleOhlcvAsync / resampleTicksByTimeAsync / resampleTicksByCountAsync gain options.map, applied to Parquet rows and object-shaped AsyncIterable items (tuples/Float64Array unaffected).
• Parquet reader now reads exact canonical columns only; any other layout requires map. Removes the OHLCV/TICK alias tables and resolveColumn guessing (per user: aliasing can go now that map exists).
• CLI: --map field=sourceKey flag (Record form) threads into CSV header resolution, JSON/JSONL object key remap, JSON array buffer path, and the Parquet branch. With --map a CSV first line is always the header.
• Tests: parquet custom-name Record/function map + partial-map error + alias fixture now requires map; library CCXT-style Record/function map on object streams + tuple pass-through; CLI --map on CSV/JSON/parquet/pipe + invalid field. Fixtures ohlcv_custom.parquet, ticks_custom.parquet added.
• README + changeset updated: map option (Record + function), CLI --map, aliasing removed.

• chore: exclude .js.map sourcemaps from published package (16 files, 23.8kB)

• perf(deps): drop lodash dependency; implement 7 helpers natively

Install footprint: 461 kB -> ~145 kB. The seven lodash helpers used (isPlainObject, sum, max, min, groupBy, sortBy, chunk) were the entire 315 kB lodash package as a runtime dep; each is now a native inline implementation (stable Array.sort, plain-object grouping, loop min/max/sum, slice-based chunking). Runtime deps are now commander + hyparquet only — we install only what we build.

• perf(deps): replace commander with mri (tiny 4kB arg parser); fix mri config-mutation bug; clean unknown-option errors