text: Title: More adapters
  Body: Implement adapters:
  
  - [x] WeatherAPI
  - [x] CSV files
  - [x] Google Sheets
  - [x] Socrata
  - [x] Pandas
  - [x] Datasette
  - [x] Github repositories
  - [x] [XML](https://github.com/betodealmeida/shillelagh/issues/389)
  - [ ] Google calendar
  - [ ] OpenAPI (use https://pypi.org/project/openapi3/?)
  - [ ] Clubhouse / Jira / Trello / etc.
  - [ ] Superset?
  - [ ] Slack?
  - [ ] OPeNDAP?