Implementation

1. Remove augmentComponent and componentSpec, several issues for the current implementation

• We use the same spec file to for root and child/leave components but just cherrypick some of the prototype/static method for root, which doesn't make much sense to share the logic as most of the logic just for child node, and it increase the complexity greatly
• We never really document some API such as this.shouldFollowLink, but in our code logic we are assuming the method exists (black magic).
• We heavily relies on assigning global (window instance) and access cross function or passing via context/props, which makes the logic pretty complicate (as we need to fallback check the context or props)

1. Move to use React context. Centralized some method such as executeEvent, or the reactI13nInstance, each component we wrapped with another Context.Provider to overrides the I13nNode and ParentNode but share those common function
2. Migrate componentSpec to hooks so the lifecycle will be much cleaner, and we can separate hooks like plugin (useScanLinks, useViewportDetect` ...) and each hooks handle its own logic, the main I13nComponent file will be much cleaner to read
3. For external facing API, we will create both HOC and hook for user to access the method, so it could be used in both functional component/class
4. Replace viewport detect logic using intersection observer

Breaking changes

1. If you need to support browser not supporting intersection observer, you must require polyfill
2. If you are using functional component or class for createI13nNode, we will pass innerProps to the wrapped component, and you must attach to your render function
3. No longer expose ReactI13n.getInstance, you can directly import { getInstance } from 'react-i13n
4. Remove legacy context this.context.i13n, we will use directly react context import { I13nContext } from 'react-i13n which expose executeEvent

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