feat(blueprints): add printable event helper function and blueprint for a token that prints parseable events in json format

[arielmelendez]

Motivation:
Allow processes to utilize their log output streams to deposit newline-delimited JSON events. This allows CUs to parse and transport these events, if desired, to any destination outside of AO that might be useful to them.

Example Use Cases:

• print events to the console
• transport events to a log streaming platform
• transport events to a durable object store for later processing (e.g. CQRS pattern)
• transport events to a pub/sub system outside of AO
• transport events to a metrics or analytical process system (e.g. Honeycomb) and send alerts based on trigger conditions

The eventing_token.lua blueprint is a modified copy of the original token blueprint. Some of the boilerplate comments have been removed from the file for brevity but can be restored if desired.

Technical Notes:
The event format for this contribution uses a compact flag _e: 1 for parsers to identify parseable events.

[twilson63]

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