Small house-keeping change to keep Foundry-related bash scripts organised in a single directory. This script doesn't seem to be called from anywhere, and doesn't have a yarn command in `package.json` so it was fine to move it without any changes in other files.

Two helper commands to run two Foundry-related bash scripts during local development.

Successfully deploys bytecode to `proxyAdminAddress`.
Does not yet dump state correctly, or call functions to active L2 correctly.

1. `anvil-devchain:start-L2`: which creates and migrates an L2 devchain
2. `anvil-devchain:check-is-running`: which can be used to check that an anvil instance is running locally and serving at localhost:8546

…lity

Now successfully activates CeloDistributionSchedule.
Does not yet dump state correctly

Simplifies maintenance and readability of scripts.

Simplifies maintenance and readability of scripts.

At this point, the migration works as intended and the L2 is activated.
But, I haven't yet saved the devchain state file.
I'll need to refactor the way the L1 and L2 move the state file around.

…ish-L2-devchain

…chain.sh`

To keep it consistent with the L1 script

On CI it seems like `jq` doesn't find the artifacts without an explicit path

```sh
./scripts/foundry/create_and_migrate_anvil_devchain.sh
  shell: /usr/bin/bash -e {0}
  env:
    FOUNDRY_CACHE_KEY: 2
    SUPPORTED_FOUNDRY_VERSION: nightly-f625d0fa7c51e65b4bf1e8f7931cd1c6e2e285e9
    ANVIL_PORT: 8546
jq: error: Could not open file build/contracts/Registry.json: No such file or directory
jq: error: Could not open file build/contracts/Proxy.json: No such file or directory
```

Source: https://github.com/celo-org/celo-monorepo/actions/runs/9808280627/job/27083755032#step:18:9

Can't find build artifacts on CI, so trying to work out what might be wrong.

Since the constants are read before any foundry compilation occured, the constants can't read from the Foundry artifacts. Locally, I missed this because I had existing artifacts from previous compilations.

Mistakenly read artifacts from Truffle's `build/` directory. Took a while to remember that Foundry write artifacts to `out/`.

Source: https://book.getfoundry.sh/reference/forge/forge-build#build-modes

Not confident enough to remove it in this PR.

Also updates integration test to explicitly run against L1 devchain, and not L2 devchain.

CI doesn't like `lsof` command in `stop_anvil.sh`

```sh
/runner/_work/celo-monorepo/celo-monorepo/packages/protocol/scripts/foundry/stop_anvil.sh: line 10: lsof: command not found
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
```

Source: https://github.com/celo-org/celo-monorepo/actions/runs/9811181588/job/27092901761?pr=11107#step:19:7073

Simplifies code and makes it easier to update ports in a single place.

CI fails if I don't explicitly kill an existing anvil server, so I decided to install `lsof` which is used by `stop_anvil.sh` to kill processes.

```sh
error binding to 127.0.0.1:8546: error creating server listener: Address already in use (os error 98)
```

Source: https://github.com/celo-org/celo-monorepo/actions/runs/9811346558/job/27093342967?pr=11107#step:20:30

Not sure if that's the bug, but the last run where the installation and use was in different steps didn't work.

I'm struggling to terminate the previous anvil server and re-start a new anvil server at the same address (local host 8546).

I tried to work around cumbersome CI environment issues (`lsof` which we use to identify the process is not available on CI).

For now, as a quick fix, I'll start anvil at an arbitrary different port 8547 and run the test against that localhost 8547.

I'll need to refactor this better.

Starting L1 from scratch instead of JSON state to circumvent this Anvil bug foundry-rs/foundry#7502.

Co-authored-by: soloseng <102702451+soloseng@users.noreply.github.com>

Co-authored-by: soloseng <102702451+soloseng@users.noreply.github.com>

… CELO

Arbitrary amount chosen to be approximately equal to `GoldToken.totalSupply()` on the L1 Mainnet (695,313,643 CELO as of this commit). During the real L2 genesis, the VM will calculate and set an appropriate balance.

```sh
# Get address of GoldToken
$ cast call \
0x000000000000000000000000000000000000ce10 \
"getAddressForStringOrDie(string calldata identifier)(address)" \
"GoldToken" \
--rpc-url https://forno.celo.org
0x471EcE3750Da237f93B8E339c536989b8978a438

# Call `totalSupply()` on `GoldToken.sol`
$ cast call \
0x471EcE3750Da237f93B8E339c536989b8978a438 \
"totalSupply()(uint256)" \
--rpc-url https://forno.celo.org
695313643195035937058427065 [6.953e26]

# Convert units from wei to ether
$ cast to-unit 695313643195035937058427065 ether
695313643.195035937058427065
```

More context, examples, background, files in the package.