This Pull Request offers a fuzzer which is capable of detecting faults in the parser and interner. It does so by ensuring that the parsed AST remains the same between a parsed source and the result of parsing the `to_interned_string` result of the first parsed source.
It changes the following:
- Adds a fuzzer for the parser and interner.
Any issues I raise in association with this fuzzer will link back to this fuzzer.
You may run the fuzzer using the following commands:
```bash
$ cd boa_engine
$ cargo +nightly fuzz run -s none parser-idempotency
```
Co-authored-by: Addison Crump <addison.crump@cispa.de>