feat: Add new Safe Wallet reusable workflow

[Le-Caignec]

Add Safe Transaction Proposer Reusable Workflow

Summary

Adds a reusable GitHub Actions workflow to create and propose transactions to Safe multi-signature wallets.

Technical Details

• Workflow: .github/workflows/safe-transaction.yml
• Dependencies: Safe API Kit, Protocol Kit, Ethers.js
• Inputs: Safe address, target address, transaction data, RPC URL, API key
• Outputs: Transaction hash and details
• Security: Hardcoded Call operation (no DelegateCall)

Usage

jobs:
  safe-transaction:
    uses: ./.github/workflows/safe-transaction.yml
    secrets:
      proposer-private-key: ${{ secrets.PROPOSER_PRIVATE_KEY }}
      safe-api-key: ${{ secrets.SAFE_API_KEY }}
    with:
      safe-address: "0x..."
      transaction-target-address: "0x..."
      transaction-data: "0x..."