Update cookie banner guides - include notes to disable additional features

[MarconLP]

Summary

Our current cookie banner guides will only disable cookie persistence when rejected. We should include a note letting users know that they can disable additional features:

• disabling event capture entirely (posthog.opt_out_capturing())
• disabling surveys
• disabling autocapture
• disabling replays

export const configForConsent = (): Partial<PostHogConfig> => {
    const consentGiven = localStorage.getItem('cookie_consent') === 'true'

    return {
        persistence: consentGiven ? 'localStorage+cookie' : 'memory',
        disable_surveys: !consentGiven,
        autocapture: consentGiven,
        disable_session_recording: !consentGiven,
    }
}

export const updatePostHogConsent = (consentGiven: boolean) => {
    if (consentGiven) {
        localStorage.setItem('cookie_consent', 'true')
        posthog.opt_in_capturing()
    } else {
        localStorage.removeItem('cookie_consent')
        posthog.opt_out_capturing()
    }

    posthog.set_config(configForConsent())
}

What kind of request is this?

• New docs page / feature
• Update to existing page

Which product is this for?

• Product OS (e.g. platform features)
• Product analytics
• Session replay
• Feature flags
• Experiments
• Surveys
• CDP
• Data warehouse
• Other (e.g. open source specific)

What's the priority?

• Urgent AND important ("great scott, this is horribly wrong / out of date")
• Important, but not urgent ("we need to do this, but not immediately")
• Non-urgent (this could be better / would be nice to have)

Is there a deadline for this change?

• Yes (please specify)
• No