Setup Guide: Make it clear when comma power is required

[ugtthis]

Proposed Changes

Behavior of setup guide when Mazda is selected:

• the setup note from opendbc repo appear vs saying "There are no specific setup notes for your vehicle."
• comma power is not an "Optional Step" and is listed as step 6
• in comma power step, update copy to say comma power is required vs optional

When a non-Mazda car is selected:

• biggest difference is that comma power optional step shows before comma connect optional step

UI compare

Before	After
current-ui.mp4	proposed-changes.mp4

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I can split this into multiple PRs like below, lmk:

• move comma power before comma connect optional step
• wire required comma power flag into setup data flow
• update data
• add comma power UI/UX changes

Related PR opendbc with problem context: commaai/opendbc#3492

[github-actions]

deployed preview: https://comma-web--pr322-os5j552z.web.app

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