Add template overrides to docs

[lalalune]

You can now override all templates (except for some actions). We need to add this to docs in a way that is clear and part of the advanced character customization process.

        "messageHandlerTemplate": "", // you can just use these for all platforms
        "shouldRespondTemplate": "",

        "discordMessageHandlerTemplate": "", // or be more specific per platform
        "discordShouldRespondTemplate": "",
        "discordVoiceHandlerTemplate": "",

        "telegramMessageHandlerTemplate": "",
        "telegramShouldRespondTemplate": "",

        "twitterPostTemplate": "",
        "twitterMessageHandlerTemplate": "",
        "twitterSearchTemplate": "",
        "twitterShouldRespondTemplate": "",

"continueMessageHandlerTemplate": "", // overrides the messageHandlerTemplate, which overrides internal template


        "goalsTemplate": "",
        "factsTemplate": "",
        "evaluationTemplate": ""
        ```

[github-actions]

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