rmet 0.1.0

• Initial CRAN release.
• Added inmet_download() with a retry and resume algorithm to handle unstable connections when downloading ZIP archives.
• Added inmet_read() to safely parse raw INMET CSVs. It automatically drops trailing semicolon artifacts, aligns missing columns across years, parses multiple legacy date formats, and shifts UTC times to local Brazilian time (America/Sao_Paulo).
• Added inmet_extract() for safely extracting CSVs to a local directory.
• Added inmet_stations() to provide a bundled, offline-ready catalogue of automatic weather stations.
• Added cache management utilities: inmet_cache_status() and inmet_cache_clear().