Create 9. Conclusion: Sandbox as the Bridge to Bitcoin Smart Contracts

Create 8. Benefits for Solidity Developers

Create 7. Developer Workflow: Sandbox → Testnet → Mainnet

Create 6. Cross-Chain and EVM Compatibility on Stacks

Create 5. Using Sandbox to Prototype Solidity Logic for Stacks

Create 4. Solidity vs Clarity: Conceptual Differences

Create 3. Stacks Blockchain in a Nutshell

Create 2. What Is the Sandbox Tool?

Update README.md

Initial commit