This disallows passing non-existent options:
```ts
utils.getOptions(["doesNotExist"]); // error
```
And also disallows using options that were not requested:
```ts
const options = utils.getOptions(["ruffleEnable"]);
options.ignoreOptout; // error
```
This has few advantages:
* `Map` is more performant, and its keys cannot clash with builtin
JavaScript properties (e.g. `toString`).
* TypeScript has better type information about `map.keys()`, whereas
`Object.keys()` always return `string[]`.
Also, move `camelize` inside `getBooleanElements`, as it's only used
there, and unify the 2 `for` loops in `bindBooleanOptions` (iterating
`options` is wrong because it might contain options that doesn't exist
in the page).
This serves 2 goals:
1. Wait for the script to be injected (when the promise is resolved),
so future `sendMessageToPage` won't happen before the script can
respond.
2. Detect errors in the script injection (when the promise is
rejected).
This might create templatized functions leading to unnecessary code bloat.
So instead use just `Value<'gc>` parameters and add `.into()` in callers
where needed.
* avm2: Properly make all classes an instance of `Class`.
Also, does this technically mean that `Class` is a metaclass?
* avm2: Remove `Function::from_method_and_proto` as it will no longer be needed
* avm2: Ensure builtin classes are also instances of `Class`.
This requires tying a veritable gordian knot of classes; everything needs to be allocated up-front, linked together, and then properly initialized later on. This necessitated splitting the whole class construction process up into three steps:
1. Allocation via `from_class_partial`, which does everything that can be done without any other classes
2. Weaving via `link_prototype` and `link_type`, which links all of the allocated parts together correctly. This also includes initializing `SystemClasses` and `SystemPrototypes`.
3. Initialization via `into_finished_class`, which must be done *after* the weave has finished.
Once complete you have core classes that are all instances of `Class`, along with prototypes that have their usual legacy quirks.
Note that this does *not* make prototypes instances of their class. We do need to do that, but doing so breaks ES3 legacy support. This is because we currently only work with bound methods, but need to be able to call unbound methods in `callproperty`.
* tests: Add a test for all core classes' instance-of relationships
relrelb