* refactor: remove timeout config from downloader
The timeout should be controlled by the client
implementation.
* feat: downloader request retries
* test: add concurrent body downloader tests
* chore: fmt
Co-authored-by: Georgios Konstantopoulos <me@gakonst.com>
* chore: clean up `.gitignore`
* fix: make RO cursors `Send + Sync`
* feat(wip): bodies stage
* driveby: improve docs
* chore: don't panic if we're the first stage
* chore: use `Vec` for ommers
* feat: error handling in bodies downloader
* chore: remove stale comment
* chore: pascal-case stage id
* refactor: remove unused new fns
* refactor: distinguish downloaders with prefix
* refactor: move downloader errs to own module
* refactor: `stream_bodies` -> `bodies_stream`
* test: fix borked imports in header stage
* test: clean up header tests
* test: add basic body stage tests
* test: add 2 more body stage test skeletons
* test: move generator test utils to own module
* refactor: move proof functions to primitives crate
* feat: add block generator test utils
* test: more body stage tests
* chore: fix typo (`Cannonical*` -> `Canonical`)
* docs: document `bodies_to_download`
* test: more body stage tests
* test: more body stage tests
* refactor: clean up body stage tests a bit
* test: fix broken tests
* refactor: clean up body stage tests
* test: more body stage tests
