Add Blockchain, NFT and Web3 related skills

Blockchain, NFTs, Cryptocurrencies etc are on 🔥 right now! And so are skills related to web3 and blockchain. Solidity, Truffle, Solana etc would be the perfect example of that. I'd love to add these skills to the skills section!

I'd be adding the following skills:

1. Solidity
2. Truffle
3. Hardhat
4. Web3JS
5. OpenZeppelin
6. Metamask

Please do let me know your thoughts! Thank you!