Add support for Unicode strings to the interpreter

[willcrichton]

Right now, the interpreter shows Unicode strings as random characters. For example, given this snippet from the Rust Book:

fn main() {
    let hello = String::from("السلام عليكم");
}

Then Aquascope generates the following heap:

The issue is that Strings are serialized as a vector of chars here:

aquascope/crates/aquascope/src/interpreter/mvalue.rs

Lines 165 to 173 in b73e572

	Some(MHeapAllocKind::String { len }) => {
	let array =
	self.read_array(base, base.layout.size, *len, base.layout.ty)?;
	let MValue::Array(values) = array else { unreachable!() };
	let chars = values.map(|el| {
	let MValue::Uint(c) = el else { unreachable!() };
	MValue::Char(c as usize)
	});
	MValue::Array(chars)

And then each char is individually converted back to a character here:

aquascope/frontend/packages/aquascope-editor/src/editor-utils/interpreter.tsx

Line 285 in b73e572

String.fromCharCode(value.value).replace(" ", "\u00A0")

But that strategy doesn't work for non-ASCII strings.

[safwansamsudeen]

Could I take this up? I'm new to Rust, so I'll take some time, if that's alright.

[willcrichton]

@safwansamsudeen sure thing. Feel free to post in this thread if you have any issues getting started.