Added boa examples

[elasmojs]

This Pull Request fixes/closes #446 .

It changes the following:

• root cargo.toml to add examples to the workspace
• created examples folder with content
• added load from string
• added load from file
• added handling return val using forward_val
• added global object additions
• added a custom module handler example

[codecov]

Codecov Report

Merging #634 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #634   +/-   ##
=======================================
  Coverage   72.81%   72.81%           
=======================================
  Files         179      179           
  Lines       13197    13197           
=======================================
  Hits         9609     9609           
  Misses       3588     3588           

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[Razican]

Thank you for the contribution! I added some suggestions where I found them reasonable.

I think it would be best if we used normal Cargo examples for the examples, instead of creating a new package.

In any case, about the examples, I didn't have the time to check them thoroughly, but there are some things missing:

• I noticed no \n at the end of many files. This doesn't seem to be following the .editorConfig file in the project. Most code editors should use it by default.
• We should add CI for all these examples.
• I'm missing more module-level documentation in each example file.

[Razican]

As clippy suggests, we should use if...let here.

[Razican]

Suggested change

	}
	}

[elasmojs]

@HalidOdat Changed to engine.to_string as suggested in #633

I am able to run it in the dev branch but the CI fails at the following code snippets. Request help thanks.

Pattern 1
engine.to_string(arg).unwrap()
| ^^^^^^^^^ method not found in &mut boa::exec::Interpreter

Pattern 2
let result = arg0.to_integer() + arg1.to_integer();
| ^^^^^^^^^^- supplied 0 arguments
| |
| expected 1 argument

[HalidOdat]

Pattern 1
engine.to_string(arg).unwrap()
| ^^^^^^^^^ method not found in &mut boa::exec::Interpreter

it should be the other way around arg.to_string(&mut engine).unwrap()

Pattern 2
let result = arg0.to_integer() + arg1.to_integer();
| ^^^^^^^^^^- supplied 0 arguments

The previous implementation of Value::to_integer did not take a context, this is not spec compliant, so to fix this you need to do arg.to_integer(&mut engine)

[Razican]

I think this should be blocked until #627 lands. That will give us much better examples.

[Razican]

Hi @elasmojs, how is this going?

[jasonwilliams]

oops, rebased it and it somehow lost the changes here.
I think because the issue here closed (due to there being no changes) ive lost access to @elasmojs so i can't change it.

I've created a new PR