Improve URL implementation

[QuiiBz]

The current URL implementation is fairly simple and isn't very compliant with the spec:

cd crates/wpt-runner && cargo run -- ../../tools/wpt/url/
...
449 tests, 38 passed, 410 failed
 -> 8% conformance

Most of the failing tests are located in urlencoded-parser.any.js (102 tests, 90 fails) and url-setters-stripping.any.js (260 tests, 260 fails)

• feat(js-runtime,wpt): improve conformance #835

[20k-ultra]

How can I run these tests to try and work on this issue ? Is it resolved ?

I hoped to confirm myself by trying the following but got an error:

$ cd crates/wpt-runner && cargo run -- ../../tools/wpt/url
   Compiling lagon-runtime-isolate v0.1.0 (/home/mig/Projects/lagon/crates/runtime_isolate)
error: couldn't read crates/runtime_isolate/src/../runtime.js: No such file or directory (os error 2)
 --> crates/runtime_isolate/src/options.rs:6:26
  |
6 | const JS_RUNTIME: &str = include_str!("../runtime.js");
  |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the macro `include_str` (in Nightly builds, run with -Z macro-backtrace for more info)

I used crates/wpt-runner since packages/wpt-runner is gone

[QuiiBz]

You have to build packages/js-runtime first: pnpm install && cd packages/js-runtime && pnpm build

The contributing docs need to be updated.

[20k-ultra]

I'll PR the docs with my notes from getting the project setup

[QuiiBz]

After #835, we now have the following results:

197 tests, 130 passed, 67 failed (0 not completed)
 -> 65% conformance