feat: solana cli completions

[10krotator]

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

adding completion spec for solana-cli used by the solana blockchain developers ❤️

[withfig-bot]

All contributors have signed the CLA ✍️ ✅
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[withfig-bot]

Overview

src/anchor.ts:

Info:

URLs:

• https://api.mainnet-beta.solana.com
• https://api.devnet.solana.com
• https://api.testnet.solana.com

src/solana.ts:

Info:

URLs:

• https://api.mainnet-beta.solana.com
• https://api.devnet.solana.com
• https://api.testnet.solana.com
• https://api.mainnet-beta.solana.com
• https://api.devnet.solana.com
• https://api.testnet.solana.com

src/solana-keygen.ts:

Info:

[withfig-bot]

Hello @10krotator,
thank you very much for creating a Pull Request!
Here is a small checklist to get this PR merged as quickly as possible:

• Do all subcommands / options which take arguments include the args property (args: {})?
• Are all options modular? E.g. -a -u -x instead of -aux
• Have all other checks passed?

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[10krotator]

I have read the CLA Document and I hereby sign the CLA

[10krotator]

recheck