[Feature Request]: Add Support for Deepseek AI Service

[zhongxx]

Description

I would like to request the addition of support for the Deepseek AI service within AFFiNE. Deepseek offers powerful AI capabilities that could enhance the functionality and user experience of AFFiNE.

Use case

No response

Anything else?

No response

Are you willing to submit a PR?

• Yes I'd like to help by submitting a PR!

[affine-issue-bot]

Issue Status: 🆕 *Untriaged

*🆕 Untriaged

The team has not yet reviewed the issue. We usually do it within one business day.
Docs: https://github.com/toeverything/AFFiNE/blob/canary/docs/issue-triaging.md

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[ssly]

@hwangdev97
"Could you kindly confirm if this feature supports integration with DeepSeek and other LLM providers' APIs to enable the functionality?