Add optional dependencies for Gnosis network execution clients

[Copilot]

This PR adds optional dependencies to the Gnosis network variant of the Lighthouse package to improve integration with execution layer clients and signing infrastructure.

Changes

Added optionalDependencies field to /package_variants/gnosis/dappnode_package.json with the following packages:

• gnosis-erigon.dnp.dappnode.eth (>=1.0.2) - Erigon execution client for Gnosis Chain
• nethermind-xdai.dnp.dappnode.eth (>=1.0.69) - Nethermind execution client for Gnosis Chain
• web3signer-gnosis.dnp.dappnode.eth (>=1.0.14) - Web3Signer for secure validator key management on Gnosis

Benefits

These optional dependencies will allow users to:

1. Automatically discover and install compatible execution clients when setting up Lighthouse for Gnosis
2. Ensure proper integration with the Web3Signer for validator key management
3. Have a smoother setup experience with recommended compatible versions

The dependencies are marked as optional, meaning they won't be force-installed but will be suggested during package installation, giving users flexibility in their setup while providing clear compatibility guidelines.

Validation

• ✅ JSON syntax validation passed
• ✅ DAppNode SDK validation passed
• ✅ Existing configuration preserved
• ✅ No breaking changes introduced

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• ports.ubuntu.com
  • Triggering command: /usr/bin/qemu-aarch64 /usr/lib/apt/methods/http /usr/lib/apt/methods/http (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Add the following to the /package_variants/gnosis/dappnode_package.json file under the root of the repository:

  "optionalDependencies": {
    "gnosis-erigon.dnp.dappnode.eth": ">=1.0.2",
    "nethermind-xdai.dnp.dappnode.eth": ">=1.0.69",
    "web3signer-gnosis.dnp.dappnode.eth": ">=1.0.14"
  }

If the file does not exist, create it and ensure the content is properly formatted as JSON. If the file exists and already contains other fields, merge or add the optionalDependencies field so that the file remains valid JSON.

This pull request was created as a result of the following prompt from Copilot chat.

Add the following to the /package_variants/gnosis/dappnode_package.json file under the root of the repository:

  "optionalDependencies": {
    "gnosis-erigon.dnp.dappnode.eth": ">=1.0.2",
    "nethermind-xdai.dnp.dappnode.eth": ">=1.0.69",
    "web3signer-gnosis.dnp.dappnode.eth": ">=1.0.14"
  }

If the file does not exist, create it and ensure the content is properly formatted as JSON. If the file exists and already contains other fields, merge or add the optionalDependencies field so that the file remains valid JSON.

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