AI tools: add more servers

[linonetwo]

Allow adding more server via community plugins.

• allow choose model based on models field of server tiddler
• use authTokenStoreKey for different server, based on auth-token-store-key field on server tiddler
• fix: shining color on dark mode, it's 1 a.m. so I use nord palette
• Add a SiliconFlow server example which extends openai server tiddler, but has different models
• rename tools tiddler to utilities, because "role: "tool" in ai prompt json means providing tool calling information, so it is a keyworld should be reserverd, we can add tools config later

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[linonetwo]

Test failed because it uses a deprecated version of actions/upload-artifact: v3. Merge this into feat-ai-tools branch and let Jeremy rebase it will fix this.

[Jermolene]

Hi @linonetwo I've updated the feat-ai-tools branch from master, will that be enough to get the tests working?

[linonetwo]

@Jermolene Now it all passed.

We are still far away from https://github.com/Bin-Huang/chatbox and https://github.com/CherryHQ/cherry-studio , next thing I want to add is character preset like GPTs.

[Jermolene]

Thanks @linonetwo is this ready to merge?

[linonetwo]

@Jermolene Yes, I keep each PR small.