New rule: No chaining this to itself

[roneesh]

While reviewing a PR at my work recently, we caught an instance of this being chained to this:

this.this.foo

And it didn't throw a lint error. I'm not seeing this in the docs either as a lint rule, so I propose that it be one (and happy to work on it!)

Here is an example app: https://github.com/roneesh/no-chained-this-example/blob/main/app/components/chained-this.hbs

[roneesh]

Also please note that I upgraded to the latest version of the package and ran npm run lint:hbs and did not see any errors.

[roneesh]

Here's a screencap of that component with the server running