Add data dir to stellar doctor.

[fnando]

What

$ stellar doctor
✅ You are using the latest version of Stellar CLI: 23.1.4
ℹ️ Rust version: 1.89.0
✅ Rust target `wasm32v1-none` is installed
⚙️ Config directory: /Users/fnando/.config/stellar
📁 Data directory: /Users/fnando/.local/share/stellar-cli
ℹ️ XDR version: 4b7a2ef7931ab2ca2499be68d849f38190b443ca
🌎 Default network "local" (http://localhost:8000/rpc)
   protocol 23
   rpc f225766c37ffa46b7e456054280f973ecb19b07
🌎 Default network "futurenet" (https://rpc-futurenet.stellar.org:443)
   protocol 23
   rpc 23.0.4-7c2b6f34c6b5f953d574e1b4f0ca0cf4ee78cf97
🌎 Default network "testnet" (https://soroban-testnet.stellar.org)
   protocol 23
   rpc 23.0.4-7c2b6f34c6b5f953d574e1b4f0ca0cf4ee78cf97
🌎 Network "dev" (http://localhost:8000/rpc)
   protocol 23
   rpc f225766c37ffa46b7e456054280f973ecb19b07
🌎 Network "pubnet" (https://mainnet.sorobanrpc.com)
   protocol 23
   rpc 23.0.4-7c2b6f34c6b5f953d574e1b4f0ca0cf4ee78cf97
🌎 Network "standalone" (http://localhost:8000/rpc)
   protocol 23
   rpc f225766c37ffa46b7e456054280f973ecb19b07

Why

Snapshots are stored there, so it's helpful to know where the files are actually being stored.

Known limitations

N/A

[elizabethengelman]

🎉 great addition