chore: support hardhat (#17742)

Add links on how to use the contracts from forge and hardhat projects.

Author: just-mitch

l1-contracts/README.md

@@ -149,3 +149,10 @@ When this command is run in CI, it will fail if the markdown file generated in d
 We assume that you already have slither installed. You can install it with `pip3 install slither-analyzer==0.10.0 slitherin==0.5.0`. It is kept out of the bootstrap script as it is not a requirement for people who just want to run tests or are uninterested in the contracts.
 
 > We are not running the `naming-convention` detector because we have our own rules for naming which is enforced by the linter.
+
+# Consuming these contracts
+
+Here are sample repos on how to consume these contracts from
+
+- [foundry](https://github.com/just-mitch/hello_aztec_foundry)
+- [hardhat](https://github.com/just-mitch/hardhat-aztec-example)