Add missing protocol rewards readme (#265)

packages/protocol-rewards/README.md

@@ -0,0 +1,34 @@
+# Zora Protocol Rewards
+
+Zora is about bringing creativity onchain. Protocol Rewards is our latest offering for creators and developers to earn from their contributions to our growing ecosystem. 
+
+This repository features:
+- The `ERC721Rewards` and `ERC1155Rewards` abstract smart contracts which handle reward computation and routing for Zora [ERC-721](https://github.com/ourzora/zora-drops-contracts) and [ERC-1155](https://github.com/ourzora/zora-1155-contracts) NFT mints
+- The `ProtocolRewards` singleton smart contract used to deposit and withdraw rewards
+
+Documentation is available at [docs.zora.co](https://docs.zora.co).
+
+## Implementation Caveats
+
+The `ProtocolRewards` contract has a implementation caveat. If you send any value to a zero (`address(0)`) address in `depositRewards`, that value is implicitly burnt by being locked in the contract at the zero address. The function will not revert or redirect those funds as currently designed. We may re-visit this design in the future but for the release of  v1.1 this is the current and expected behavior.
+
+## Deployed Addresses
+
+`ProtocolRewards` v1.1 is deterministically deployed at 0x7777777F279eba3d3Ad8F4E708545291A6fDBA8B.
+
+Current Supported Chains:
+- Zora Mainnet
+- Zora Goerli
+- Ethereum Mainnet
+- Ethereum Goerli
+- OP Mainnet
+- OP Goerli
+- Base Mainnet
+- Base Goerli
+
+## Install
+
+To interact with the `ProtocolRewards` contract:
+```sh
+yarn add @zoralabs/protocol-rewards
+```