Implement annotations within pattern markdown

[bmuenzenmeyer]

Implement pattern-lab/the-spec#33

QUESTIONS:

• determine if shared frontend needs to change

PL NODE:

• warn user if annotations file found
• remove old method from any paths / copying / watches
• each pattern tracks annotations
• fix output method, no longer a single file to parse
• unit tests

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.