ci: Codecov badge in bedrcok and ignore some files

ci: Codecov badge in bedrcok and ignore some files

.changeset/silver-comics-march.md

+---
+'@eth-optimism/contracts-bedrock': patch
+---
+
+Added codecov badge to readme

codecov.yml

@@ -3,6 +3,7 @@ ignore:
   - "l2geth"
   - "**/*.t.sol"
   - "op-bindings/bindings/*.go"
+  - "packages/contracts-bedrock/contracts/(vendor|libraries)/(trie|rlp)"
 flag_management:
   # Note: flags should have the same name as the circleci job in which they
   # are uploaded.

packages/contracts-bedrock/README.md

 # Optimism Smart Contracts (Bedrock)
 
+[![codecov](https://codecov.io/gh/ethereum-optimism/optimism/branch/develop/graph/badge.svg?token=0VTG7PG7YR&flag=contracts-bedrock-tests)](https://codecov.io/gh/ethereum-optimism/optimism)
+
 This package contains the smart contracts that compose the on-chain component of Optimism's upcoming Bedrock upgrade.
 We've tried to maintain 100% backwards compatibility with the existing system while also introducing new useful features.
 You can find detailed specifications for the contracts contained within this package [here](../../specs).

packages/data-transport-layer/README.md

 [![codecov](https://codecov.io/gh/ethereum-optimism/optimism/branch/master/graph/badge.svg?token=0VTG7PG7YR&flag=data-transport-layer)](https://codecov.io/gh/ethereum-optimism/optimism)
+
 # @eth-optimism/data-transport-layer
 
 ## What is this?