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/aws_http_client/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "aws_http_client"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/aws_http_client.rs"
+
+[features]
+default = []
+
+[dependencies]
+aws-smithy-runtime-api.workspace = true
+aws-smithy-types.workspace = true
+futures.workspace = true
+http_client.workspace = true
+tokio = { workspace = true, features = ["rt", "rt-multi-thread"] }