Warn developers if they are using `List<int>` or `List<double>` where they could safely use a typed data list

For example, a `List` of 1000 entries will use at least 64 * 1000 bits.

If that list will only ever contain small numbers, a Int32/Int16/Int8List would use less memory.

We should check if this would help some of our larger applications, and if so, find a way to add a warning to devtools.

/cc @jacob314

The issue names no files, tests, or entry points. Start by evaluating whether typed data lists benefit the larger applications mentioned, then identify where DevTools could surface a warning. Done means the benefit is established and a concrete warning approach is defined.

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