Bump to v1.1.0 — aligns with CAL spec v1.1

WATCH keyword and SURFACE ON modifier already implemented in
parser, executor, and types. 192/192 tests passing.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

0.2.0

Prepare for Zenodo archival: add CITATION.cff, update README

Add machine-readable citation metadata with ORCID, ecosystem references,
and keywords. Update README with features, architecture, citation section,
and ecosystem links. Remove outdated project status checklist.

Co-Authored-By: Claude Opus 4.6 <[email protected]>