Setup CI workflows

[lukasz-zimnoch]

This task is about setting up a basic CI machinery providing the following jobs:

• Build & test
• Format
• Deploy testnet environment (should deploy BoB against Base Sepolia upon merge to main and allow to deploy against Base Goerli manually on-demand)

### Tasks
- [ ] https://github.com/threshold-network/bitcoin-on-base/pull/16
- [ ] https://github.com/threshold-network/bitcoin-on-base/pull/24
- [ ] https://github.com/threshold-network/bitcoin-on-base/pull/31
- [ ] https://github.com/threshold-network/bitcoin-on-base/pull/32
- [ ] https://github.com/threshold-network/bitcoin-on-base/pull/34