Issue add tags to readme

[dccakes]

Adds tag samples across a couple of contracts for better detail.

[pflooky]

Thanks for the PR @dccakes! Could you also update the description and examples for tags in the JSON schema as well?
Specifically in the file https://github.com/bitol-io/open-data-contract-standard/blob/dev/schema/odcs-json-schema-latest.json

[dccakes]

Thanks for the PR @dccakes! Could you also update the description and examples for tags in the JSON schema as well? Specifically in the file https://github.com/bitol-io/open-data-contract-standard/blob/dev/schema/odcs-json-schema-latest.json

Comment Addressed - @pflooky