GCP testnet chain configs

[cdrappi]

Note

Adds GCP-based testnet chain configs (createSeismicGcpTestnet, seismicTestnetGcp1/2) and bumps packages to 1.0.53 with updated peer dependency.

• seismic-viem:
  • Add GCP testnet factory: createSeismicGcpTestnet(n) in src/chain.ts.
  • Add new chain exports: seismicTestnetGcp1, seismicTestnetGcp2.
  • Re-export new creators/chains from src/index.ts.
• seismic-react:
  • Update peer dependency to seismic-viem@>=1.0.53.
• Versioning:
  • Bump seismic-viem and seismic-react to 1.0.53.

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