Adds bundle support to block builder (#8)

* WIP: adding bundle fetcher support

* WIP: separating auth out into authenticator

* WIP: fixing the cannot drop a runtime in a blocking context error

* WIP: Fixes tokio runtime drop bug

* wip: cleanup and remove imports

* chore: fix dep error

* chore: mark bundle poller test as it

* feat: spawn bundle poller and handle exits

* feat: ingest bundle transactions, drop bundle on failure

This implements ingesting bundle transactions naively. It does not take into account the bundle "rules", so to say, which would make it a bit more complex. If a transaction fails to decode, the bundle is considered "invalid", and dropped.

* chore: clippy

* chore: comments

* chore: clarify comment on signed orders

* chore: dedup oauth, do not use spawn blocking

* chore: remove unneeded async

* chore: clean up authenticator

* feat: track seen bundles to dedup

* feat(`oauth`): caching, shareable authenticator (#19)

* feat: caching, shareable authenticator

* fix: actually spawn builder task lmao

* chore: remove unnecesary mut selfs

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Co-authored-by: evalir <e@evalir.xyz>

fix: whitespace change (#16)

Merge pull request #1 from init4tech/swanny/new-day-new-repo

feat: ctrl c ctrl v