feat(robo/flashcore): Flashcore.fork() API

[Pkmmte]

Flashcore should have the ability to be forked. Not only with namespaces, but also their own adapters injected in between.

Use cases:

• LRU caching only for plugin data
• More organized data debugging
• Improved logging solutions
• Data redundancy

This fork would only run the provided adapters, if any, in between. For example, .get would be updated to look for data in the fork's adapter first, then fall back to the parent if none found. .set would also set the value in the fork first before the primary adapter for consistency.

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Changeset: minor