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feat(core): Enhance Improvements: pattern-based results as options and read-independent enhancers support (#92)

feat(core): Enhance Improvements: pattern-based results as options and read-independent enhancers support (#92)

Add support for allowing **_editCond-style_ patterns** as a return value for enhancers. With this, we will run those updates in an optimized way.

Add support for **read-independent enhancers**. These enhancers are not connected with a certain kind, but are executed in parallel with the read.

With the above changes, the enhance API now is the following:
```javascript
// registration (read-dependent)
enhance.register(kind, enhancer)

// enhancer signature (read-dependent)
enhancer :: async (el, context) => (el => el) || [[pattern, el => el], ...]

// registration (read-independent)
enhance.register(enhancer)

// enhancer signature (read-independent)
enhancer :: async context => (el => el) || [[pattern, el => el], ...]
```

Bonus: enrichers tree-walk is not done when there are no registered enrichers.

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