[New] prop-types: handle variables defined as props

[chiawendt]

Fixes #442, fixes #1002, fixes #1257, fixes #1764. (let {props} = this)
Fixes #833, fixes #1116 (const Foo = ({ a }) => <>{ a.b }</>)

This pr fixed cases where a variable is defined as props.**.* For example:

// cache props let props = this.props; use(props.a); // cache a property of props let {a} = props; use(a.b) // param destructuring const Foo = ({ a }) => <>{ a.b }</>

In order to tell weather foo.a is a props usage, we need to tell whether foo is defined as props.**.*. For that purpose a Map is used.

[EvHaus]

Nice. Thanks for taking this task on, it's been on my wish list for a very long time. This likely resolved more issues than just the ones you tagged, so we'll want to do a full review all open no-unused-prop-types issues and resolve the remaining ones as well. I can help with that once this lands.

Have you done any testing to ensure that double reassignments will still work? ie:

let {a} = props let b = a; return <Used thing={b} /> 

At the very least, that shouldn't throw new any warnings. Might be good to add a test case for that to confirm.

Otherwise LGTM

[ljharb]

I'll merge now; we can add more test cases in a followup.