Implements #8025: `LazyObject` now has a `visitChildren` method that observes each direct-child `LazyObject`. `childrenAstNodes` is now a simple function that flattens non-Tree nodes out of the hierarchy; `validateSpans` visits both `Tree`s and `Token`s the same way we would use the `ItemVisitor` Rust API.
- Change imports from `'./'` relative imports to `@/` or `shared/` whenever possible
- Imports in `shared/` and `ydoc-server` have been avoided for now in case they don't work with `@/` imports.
- Deduplicate `events.ts`, remove `useDocumentEvent` in favor of `useEvent(document,` (and same for `useDocumentEventConditional`
- Replace incorrect doc comments (`//*` and `///`) with correct doc comments (`/**`)
# Important Notes
None
- Removed `Cursor` and moved all accessors to standalone functions, reducing the generated code size significantly (especially after minification).
- Removed unnecessary `seek`s from everywhere. Now the offseting is part of each `read` implementation.
- Removed unnecessary differences between `read`s on abstract and concrete types. Now abstract types do the pointer access internally in their `read`.
Generate TS bindings and lazy deserialization for the parser types.
# Important Notes
- The new API is imported into `ffi.ts`, but not yet used.
- I have tested the generated code in isolation, but cannot commit tests as we are not currently able to load WASM modules when running in `vitest`.
