rcamelspe 0.1.0

• Initial release of rcamelspe.
• High-performance data reading engine:
  • Uses arrow::open_dataset() with predicate pushdown and column projection for lightning-fast querying and minimal memory overhead on daily hydroclimatic records.
  • Adaptive routing based on CSV size and opening-cost heuristic, avoiding unnecessary scans for medium-sized selections.
  • Added start_date and end_date parameters to load_pe_timeseries() for temporal slicing at scan time.
  • Accelerated load_pe_attributes() by filtering target gauges prior to relational joining with collapse::join().
  • Preserves original data integrity when binding tables.
• Default downloads use CAMELS-PE 1.0.1 (Zenodo 21195425), with 1.0 remaining selectable.
  • Download wrappers honor version and set_path.
• Drop-in compatibility with RCamelsPE:
  • Added function aliases read_timeseries(), read_attributes(), read_metadata(), read_dictionary(), read_geospatial(), download_camels_pe(), set_camels_path(), get_camels_path(), plot_timeseries(), plot_catchments(), and plot_attribute_map().
• Bundled sample dataset:
  • Added a lightweight self-contained sample dataset in inst/extdata/sample_camels_pe (~120 KB) enabling autonomous execution of examples and tests without requiring external internet downloads.
• Added visualization utilities:
  • plot_pe_timeseries() with curated color palette and faceting options.
  • plot_pe_catchments() for boundaries and gauging station spatial inspection.
  • plot_pe_attribute_map() for choropleth mapping of catchment attributes.