Fix deployer cli cmd for :all cmd

[kwiss]

Is this feature related to a problem? Please describe.

Current implementation of the deployer cmd: deploy:starknet:all is removing all the content of the contracts.json file because of:

(async () => {
  await fs.writeFile(
    getContractsFilePath(),
    JSON.stringify({
      goerli: {},
      sepolia: {},
      mainnet: {},
      dev: {}
    })
  );
})();
```

**Describe the solution you'd like**

Change the way to update the file and instead of cleaning completly the file let's just remove the network affected by the cmd
(dev, goerli, mainnet)

**Alternative solutions**

Having separate files for each network contracts could be another solution

[vibenedict]

Can I hop on this? @kwiss

[vibenedict]

Hi @kwiss