## Why
Due to the usage of `&'alloc mut T` in `oxc_allocator::Box`, and
`bumpalo::collections::Vec` in `oxc_allocator::Vec`, ast types are
currently invariant over their allocator lifetime `'a`. This prevents
`ouroboros` from generating `borrow_*` on ast type fields, leading to
the unfriendly `with_*` api:
c250b288ef/crates/oxc_parser/examples/multi-thread.rs (L82-L84)
## How
- For `oxc_allocator::Vec`, switch to `allocator_api2::vec::Vec`, which
has a covariant relationship with the allocator lifetime.
- For `oxc_allocator::Box`, use `std::ptr::NonNull` which is
specifically designed to be covariant. I don't use
`allocator_api2::boxed::Box` because it holds the allocator for
dropping, so the size is bigger.
## Downside
Now that `oxc_allocator::Box` uses the unsafe `NonNull`. It has to be a
private field to be safe. This make it impossible to do `Box(....)`
pattern matching.
Preparatory step for #2620.
This PR purely changes names of types and methods:
* `CompactString` -> `CompactStr`
* `Atom::to_compact_string` -> `to_compact_str`
* `Atom::into_compact_string` -> `into_compact_str`
Have split this into a separate PR as the diff is large, but it does absolutely nothing but renaming (I've checked the whole diff twice, so feel free not to check it again!). This should make it easier to see the content of the substantive change in #2620.
The regression case in typescript is as expected since we don't
currently store `AccessorProperty` in `ClassTable`.
The following code is one of those cases
```ts
class C1 {
accessor #a: any;
accessor #b = 1;
static accessor #c: any;
static accessor #d = 2;
constructor() {
this.#a = 3;
this.#b = 4;
}
static {
this.#c = 5;
this.#d = 6;
}
}
```
But there was an error
```shell
Expect to Parse: "conformance/classes/propertyMemberDeclarations/autoAccessor2.ts"
× Private field 'a' must be declared in an enclosing class
╭─[conformance/classes/propertyMemberDeclarations/autoAccessor2.ts:9:1]
9 │ constructor() {
10 │ this.#a = 3;
· ──
11 │ this.#b = 4;
╰────
```
Let's leave it alone for now. Because of the `AccessorProperty` I
haven't seen it in any repo.
