build: add dev-dependencies for doctest

Most tests will still fail due to the API key but this will make checking of the code formatting, etc. easier.

Cargo.lock

@@ -1075,9 +1075,21 @@ dependencies = [
  "mio",
  "pin-project-lite",
  "socket2",
+ "tokio-macros",
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "tokio-macros"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e06d43f1345a3bcd39f6a56dbb7dcab2ba47e68e8ac134855e7e2bdbaf8cab8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "tokio-native-tls"
 version = "0.3.1"

Cargo.toml

@@ -14,6 +14,8 @@ keywords = [
     "tokio",
 ]
 
+[dev-dependencies]
+tokio = { version = "1.45.0", features = ["fs", "rt", "rt-multi-thread", "macros"] }
 
 [dependencies]
 bytes = "1.10.1"