feat(sidebar): Add link to marketing homepage inside product

[chadwhitacre]

Closes #25670.

@ckj This implements your first suggestion (from private Slack):

I can think of two paths forward at this point 1) add a link to the user/org dropdown. 'Visit Sentry.io' or 2) add a link to the footer saying the same

The footer felt way too distant. Lots of scrolling to discover that there are even links down there (does anyone ever click on those? genuinely interested). Also, "Visit Sentry.io" felt weird because the user is already on https://sentry.io/. 🙈

Choice of "Homepage" and "Pricing" is based on @chriswiggins' input:

The issue with "Its in the product" is that 9/10 I just want to see your pricing plan options on your marketing screen, because to me this is a much better way of viewing it.

... and also my own experience as a Sentry champion at my last workplace prior to joining Sentry, where I was in the same boat as @chriswiggins (roughly: wtf why am I not on https://app.sentry.io/ can I please get to the pricing page without logging out oh well I guess I'll open an incognito window 🙄). Also, this gives a nice nudge to self-hosted users who have no other persistent reminder in-app right now that SaaS exists. "Homepage" by itself felt alone, more than two items seemed excessive, adding "Pricing" felt like it gives helpful context without being overwhelming.

Checked, menu still works fine on a small phone.

You okay with this approach?

(Technical reviewer note: I'm not sure about the logic around <Divider /> ... is it possible to have neither a user nor an organization? 🤔)

Screenshots

[ckj]

The footer felt way too distant.

Sure, but it is on the surface. This solution requires a click to discover.

If we do go the menu route, I'd prefer we just stick with a single Homepage link.

[chadwhitacre]

I'd prefer we just stick with a single Homepage link.

Done in d7f252c. 👍

[chadwhitacre]

Also, ftr, the left side of the footer is occupied by a version string in self-hosted. On the other hand there is also a "Migrate to SaaS" link in the footer on self-hosted, so I was wrong about there being no permanent reminder in-app.

Sure, but it is on the surface. This solution requires a click to discover.

Fair enough. Maybe the lower left in the sidebar could work? "Help" is already navigating away from the app and "What's New" is already marketing-ish, so I think it fits pretty well conceptually (imo it does feel a bit out of place with the org/user menu, in addition to requiring a click to discover).

P.S. Not sure if bikeshedding or pixels-mattering at this point. 😬

[evanpurkhiser]

I feel a little be weary about linking out to the pricing page in the OSS project. Even in the SAAS product, we have a number of links that take you to the pricing page in a more contextual way.

Also in the open source version, you can just go to sentry.io, and it will take you to the home page.

I think we should make these changes in getsentry.

[chadwhitacre]

I feel a little be weary about linking out to the pricing page in the OSS project.

"Pricing" link was removed in d7f252c, now this just adds a link to "Homepage."

[evanpurkhiser]

Just a couple minor comments but looks good