feat(lazer/sdk/rust): add rust client for Lazer (#2310)

* feat: add rust consumer sdk for lazer

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* feat: rename crate to pyth-lazer-sdk and client to LazerClient

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* fix: update base64 encoding to use Engine::encode

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* fix: add base64 Engine trait import

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* feat: add example for pyth-lazer-sdk

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* fix: fix example

* refactor: separate client new() and start() functions, improve unsubscribe example

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* refactor: use Bearer token authentication in header and improve unsubscribe handling

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* refactor: make access token required parameter

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* fix: remove invalid client return from start function

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* style: improve code formatting and fix example documentation

Co-Authored-By: Tejas Badadare <tejas@dourolabs.xyz>

* fix: formatting, example

* refactor: rename, remove doctest

* fix: example

* feat: add close()

* refactor: move binary msg parsing to protocol crate, improve examples, source token from env for easier testing

* feat: bump protocol ver

* fix: don't ser/de the binary message, leave that to the client. only b64 encode. add parse and verify to the example.

* fix: explicitly choose JsonBinaryEncoding::Base64 instead of default()

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Tejas Badadare <tejas@dourolabs.xyz>
Co-authored-by: Tejas Badadare <tejasbadadare@gmail.com>

Author: devin-ai-integration[bot]

lazer/Cargo.lock

@@ -2,6 +2,7 @@
 resolver = "2"
 members = [
   "sdk/rust/protocol",
+  "sdk/rust/client",
   "contracts/solana/programs/pyth-lazer-solana-contract",
 ]
 

lazer/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "pyth-lazer-client"
+version = "0.1.0"
+edition = "2021"
+description = "A Rust client for Pyth Lazer"
+license = "Apache-2.0"
+
+[dependencies]
+pyth-lazer-protocol = { path = "../protocol" }
+tokio = { version = "1", features = ["full"] }
+tokio-tungstenite = { version = "0.20", features = ["native-tls"] }
+futures-util = "0.3"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+base64 = "0.22.1"
+anyhow = "1.0"
+tracing = "0.1"
+url = "2.4"
+
+[dev_dependencies]
+bincode = "1.3.3"
+ed25519-dalek = { version = "2.1.1", features = ["rand_core"] }
+hex = "0.4.3"
+libsecp256k1 = "0.7.1"
+bs58 = "0.5.1"
+alloy-primitives = "0.8.19"