Chore: use maci v1.2.2

[kittybest]

• [x] update package.json: import maci-cli: 1.2.2
• [x] remove services/

The documentation would be updated in https://github.com/privacy-scaling-explorations/maci-rpgf/pull/110 If there is any information missing, then open an issue or PR for the documentation update?

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Name	Status	Preview	Comments	Updated (UTC)
maci-rpgf	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 20, 2024 7:40pm

[crisgarner]

Thanks! LGTM :shipit: