[DOCS]: In app FAQ page

[gtk-grafana]

Description of the new feature
Add a new tab or help icon in the in header that either links to a page, or display frequently asked questions directly in the app.

Acceptance Criteria
Frequent questions:

• Q: How to write logQL/ go to explore
• • A: Click kebab menu, click "Explore" link.
• Q: Where are my patterns? Why is the patterns tab empty?
• • A: Patterns must be enabled in Loki config (volume_enabled: true), only available for the last 3 hours (although persistent patterns is coming in future Loki versions)
• Q: How do patterns work? Why can I not filter patterns by level?
• • A: Patterns are only calculated for each combination of stream selectors, metadata and fields filters do not currently
• Q: User permissions, can users view Drilldown but not Explore?
• Q: Why am I not seeing level colors?
• • A: discover_log_levels: true must be set in Loki config.

What other questions do we commonly get?

Also maybe take this as an opportunity to get rid of the intercept banner for new users and roll that content in this new section, unless we opt to link to a docs page?

[JStickler]

FYI - You might want to coordinate this with the docs in product working group (#wg-docs-in-product). They're working on ways to expand on Learning Journeys and provide in-context links to relevant documentation, based on where the user is in the UI.