chore: update README (#128)

Author: prestwich

README.md

@@ -25,39 +25,29 @@ See the [Signet docs] for more info.
 
 ### What's in the SDK?
 
+- **signet-constants** - Constants for Signet, including chain IDs, contract
+  addresses, and other on-chain configuration.
 - **signet-zenith** - [Zenith] contract bindings and related types.
 - **signet-types** - Common types and utilities for Signet.
 - **signet-extract** - Extracts Signet blocks from an Ethereum block. Also
   includes test utilities for specifying host and rollup blocks.
 - **signet-evm** - A wrapper around [trevm] that implements a Signet-specific
   revm inspector for detecting orders, and Signet's block-execution logic.
+- **signet-journal** - A serializablable, unwindable journal of EVM state
+  changes.
 - **signet-bundle** - Types and utilities for simulating bundles of Signet
   transactions, and determining what fills would be required to include them.
+- **signet-sim** - Block construction library for Signet. Produces blocks from
+  a transaction cache by scoring them according to the increase in the
+  builder's balance.
+- **signet-tx-cache** - A client for Signets tx-cache webservice.
 - **signet-test-utils** - Utilities for testing Signet libraries and
   applications.
 
 ### Contributing to the SDK
 
 Please see [CONTRIBUTING.md](CONTRIBUTING.md).
 
-### Note on Stability
-
-For most users, we recommend depending on `main` for the most up-to-date
-version of the SDK. You can do this by adding lines like the following to your
-`Cargo.toml`:
-
-```toml
-signet-types = { git = "https://github.com/init4tech/signet-sdk/" branch = "main"}
-```
-
-We intend to publish these crates, however, due to dependencies on unpublished
-reth crates, we are currently unable to do so. We will be tagging release
-versions and adhering to semver as well as possible. However, our dependence on
-unstable reth APIs may result in regular breaking changes that do not adhere to
-semver. We will do our best to minimize these changes. Reth also suffers
-semi-frequent dependency rot, and as a result we cannot guarantee that
-any given tagged versions of this crate will build without modification.
-
 [Signet]: https://signet.sh
 [trevm]: https://docs.rs/trevm/latest/trevm/
 [Signet docs]: https://docs.signet.sh