Dynamic WASM Memory Limit

[Mi1ind]

Modify/Allocate required memory size as needed so we never run into out of bounds memory error.
Make it like a rune.json file (similar to package.json).

[Michael-F-Bryan]

We should be able to directly calculate the expected memory usage from a Runefile. I don't think wasmer-runtime provides an explicit hook for capping the amount of memory given to an Instance, but we could always customise the global allocator (wee_alloc) to make sure it only ever requests a certain number of pages from the runtime.

That said, the phrase "out of bounds memory error" is oddly specific, and sounds a lot more like a pointer or indexing issue than unbounded memory usage.

[Michael-F-Bryan]

Note to self: check this comment for links to examples and related issues when implementing memory limits in the future.