Add aws_http_client and bedrock crates (#25490)

This PR adds new `aws_http_client` and `bedrock` crates for supporting
AWS Bedrock.

Pulling out of https://github.com/zed-industries/zed/pull/21092 to make
it easier to land.

Release Notes:

- N/A

---------

Co-authored-by: Shardul Vaidya <cam.v737@gmail.com>
Co-authored-by: Anthony Eid <hello@anthonyeid.me>

crates/bedrock/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "bedrock"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/bedrock.rs"
+
+[features]
+default = []
+schemars = ["dep:schemars"]
+
+[dependencies]
+anyhow.workspace = true
+aws-sdk-bedrockruntime = { workspace = true, features = ["behavior-version-latest"] }
+aws-smithy-types = {workspace = true}
+futures.workspace = true
+schemars = { workspace = true, optional = true }
+serde.workspace = true
+serde_json.workspace = true
+strum.workspace = true
+thiserror.workspace = true
+tokio = { workspace = true, features = ["rt", "rt-multi-thread"] }