feat: add preferences settings page

[bigint]

What does this PR do?

🤖 Generated by Copilot at c3180f2

Added a new preferences settings page to the web app that allows users to configure their high-signal notification filter. This feature helps users to reduce the noise and focus on the most relevant notifications. Extracted some common components and logic to improve code quality and maintainability.

Related issues

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Enhancement (non-breaking small changes to existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Explanation of the changes

🤖 Generated by Copilot at c3180f2

• Create a new page for preferences settings with a sidebar and a high-signal notification filter option (link, link)
• Extract the high-signal notification filter logic and UI into a reusable component and import it in the preferences settings page and the notification settings component (link, link, link)
• Add a link to the preferences settings page in the SettingsSidebar component with an AdjustmentsIcon (link, link)
• Add meta tags and tracking for the preferences settings page in Preferences/index.tsx (link)

Emoji

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Name	Status	Preview	Updated (UTC)
prerender	✅ Ready (Inspect)	Visit Preview	Aug 20, 2023 2:29pm
web	✅ Ready (Inspect)	Visit Preview	Aug 20, 2023 2:29pm