update ember/no-get fixer to support firstObject/foo.0.bar scenarios

[hmajoros]

when firstObject / lastObject / .0. are part of a string path inside a get, the fixer treats these as properties, where in reality these are ember syntax from array prototype extensions. These paths should either be ignored entirely, or changed to use array access.

// original 
get(this, 'foo.firstObject.bar')

// bad ❌
this.foo.firstObject.bar;

// good ✅
this.foo[0].bar;

Same applies for lastObject and array based access foo.0.bar, which are all ember-specifics.

we have 2 options:

1. update the fixer to ignore any path containing firstObject / lastObject / .0.
2. update the fixer to convert these paths into array access like mentioned above.

could even do a combination of the above where they are only fixed if you specify a new configuration option like handleEmberArrayPrototypes

@lin-ll @bmish any thoughts here?

[bmish]

Yeah I think we can update the fixer to properly fix this without the deprecated Ember array syntax.