[Feature Request]: AST Explorer needs to reach inside nested scopes

### Describe the feature request

Right now I don't see a way of accessing camper code inside of `if` statements and `for`/`while` loops. Since the explorer could only find things in scope, it won't actually find anything.

### To Reproduce

Use the following code.

```js
function myCoolFunction()
{
for(int x = 0;x < 10;x++)
{
var myNestedVariable = "Hello";
}
return;
}
```

Right now the explorer does not have seem to have any way of retrieving `myNestedVariable`.

### Expected behavior

I should be able to go inside a while loop. Maybe getting a `loop` statement or `if` statement and then proceeding to get the body.

### Screenshots

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### Desktop OS

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### Desktop Browser

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### Desktop Browser Version

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### Mobile Device

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### Mobile OS

_No response_

### Mobile Browser

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### Mobile Browser Version

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### Additional context

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Start at the AST Explorer entry point and reproduce the supplied nested-scope example. Trace how scope lookup handles function bodies versus if, for, and while bodies; done means nested variables can be reached through those statements, with coverage for the reported example.

Written by the indexing model from the issue text.