feat: kv.watch support (#26)

This commit adds support for the `Database::watch` method in both SQLite
and remote backends, and the `/watch` method in the KV Connect protocol.

---------

Co-authored-by: losfair <zhy20000919@hotmail.com>

Author: lucacasonato

Cargo.lock

@@ -15,14 +15,13 @@ denokv_remote = { version = "0.4.0", path = "./remote" }
 denokv_timemachine = { version = "0.2.0", path = "./timemachine" }
 
 anyhow = "1"
+async-stream = "0.3"
 async-trait = "0.1"
 aws-config = "0.55.3"
-aws-credential-types = "0.55.3"
 aws-sdk-s3 = "0.28.0"
 aws-smithy-async = "0.55.3"
 aws-smithy-client = "0.55.3"
 aws-smithy-types = "0.55.3"
-aws-types = "0.55.3"
 axum = { version = "0.6", features = ["macros", "http2"] }
 bytes = "1"
 chrono = { version = "0.4", default-features = false, features = ["std", "serde"] }
@@ -38,15 +37,13 @@ num-bigint = "0.4"
 prost = "0.11"
 prost-build = "0.11"
 rand = "0.8.5"
-reqwest = { version = "0.11", default-features = false, features = ["json"] }
+reqwest = { version = "0.11", default-features = false, features = ["json", "stream"] }
 rusqlite = "0.29.0"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1.0.107"
 tempfile = "3"
 thiserror = "1"
 tokio = { version = "1.33.0", features = ["full"] }
-tracing = "0.1"
-tracing-futures = "0.2"
-tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
+tokio-util = "0.7"
 url = "2"
 uuid = { version = "1.4.1", features = ["v4", "serde"] }