Pure refactor. Re-order imports for clarity:
1. `std`
2. External crates
3. `oxc_*` crates
4. Current crate `use crate::...`
5. Super `use super::...`
6. Local modules
This order is from "furthest away" to "closest". This makes it clearer to see what is coming from where.
`cargo +nightly fmt` (#7877) did a lot of the work, but unfortunately `rustfmt` does not have an option to (a) put workspace crates in a separate block from external crates and (b) move `mod` statements to after `use` statements.
This PR does not upgrade rustc. Only changes are applied.
We cannot upgrade to the lastet Rust version yet due to wasm-bindgen
breaking some generated types.
THere's also some elided lifetimes in `**/generated/**`, which requires
modification to ast tools.
Move post-transform checker into a `tasks` crate. It doesn't feel like it belongs in `oxc_semantic`. It also feels like too heavy a lump of code to put in `tasks/common`.
