feat: support jsonrpc 0.9.0-rc2

[kariy]

Bumps the supported Starknet JSON-RPC spec to 0.9.0-rc.2.

starknet-rs still hasn't published a version on crates.io yet so for now we're using the exact git rev. New version published (0.17.0-rc.2) with new rpc support.

Currently, this bump is primarily made in order to compile Katana with the new RPC spec as it relies on starknet-rs too.

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Note

Upgrade deps for JSON-RPC 0.9 support (starknet 0.17.0-rc.4, cainome git rev), change default block tag to PreConfirmed, and pin Rust toolchain to 1.87.0.

• Dependencies:
  • Bump starknet to 0.17.0-rc.4 and switch cainome to a specific git rev (1e7afb2) with abigen-rs feature.
  • Update related starknet-* crates; starknet-types-core now pulls blake2, digest, zeroize.
• Bindgen (piltover/src/bindgen.rs):
  • Default BlockTag for AppchainContract::new and AppchainContractReader::new changed from Pending to PreConfirmed.
• Tooling:
  • Pin Rust toolchain to 1.87.0 in rust-toolchain.toml.

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