chore: update bao-tree dependency and get rid of iroh-blake3 dep (#81)

## Description

Update bao-tree dependency and get rid of iroh-blake3 dep

## Breaking Changes

None

## Notes & open questions

Note: the purpose of this is to be able to retire our blake3 fork. It
should not change anything other than that.

## Change checklist

- [x] Self-review.
- [x] Documentation updates following the [style
guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text),
if relevant.
- [x] Tests if relevant.
- [x] All breaking changes documented.

Author: rklaehn

Cargo.lock

@@ -15,11 +15,11 @@ rust-version = "1.81"
 [dependencies]
 anyhow = { version = "1" }
 async-channel = "2.3.1"
-bao-tree = { version = "0.13", features = [
+bao-tree = { version = "0.15", features = [
     "tokio_fsm",
     "validate",
 ], default-features = false }
-blake3 = { version = "1.4.5", package = "iroh-blake3" }
+blake3 = { version = "1.8" }
 bytes = { version = "1.7", features = ["serde"] }
 chrono = "0.4.31"
 clap = { version = "4.5.20", features = ["derive"], optional = true }