apifetch 0.1.0

• Initial CRAN release.
• A generic, dependency-light toolkit for token-authenticated REST APIs, generalising the engine first developed in the ‘BigDataPE’ package.
• Token management in process environment variables, namespaced per service: af_store_token(), af_get_token(), af_remove_token(), af_list_tokens().
• API profiles via af_api(), with pluggable authentication strategies (af_auth_raw(), af_auth_bearer(), af_auth_header(), af_auth_query()) and pagination strategies (af_paginate_offset(), af_paginate_none()).
• Data retrieval with af_fetch() (single page) and af_fetch_all() (chunked, combined into one tibble), built on httr2.
• All user-facing output goes through the cli package.
• Includes a vignette showing the Big Data PE platform as a worked use case.