Relicense code as MIT, document CC BY-NC data license, improve metadata

- LICENSE: MIT for the code (copyright IOC-UNESCO)
- README: code vs. data clarified, License section (code MIT; S3 dataset
  CC BY-NC 4.0 following the GBIF source download), dataset and code
  citations, grammar and notebooks link fixes
- .zenodo.json: title and description reflect that the archive is the
  build pipeline and documentation, not the data; MIT license; docs link;
  GitHub link typed as software; more keywords
- CITATION.cff: aligned with Zenodo (software, MIT, concept DOI);
  OBIS listed as contact instead of author

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Revise title and description for speciesgrids dataset

Updated the title and description in .zenodo.json to provide a more detailed overview of the speciesgrids dataset.

Fix typo in package title from 'speciegrid' to 'speciesgrid'

Update title in .zenodo.json

version 0.1.0