style: Navigation improvements

[kyle-ssg]

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Changes

Improves navigation such that

• Segments, integrations and compare no longer have environment ids in their urls
• Header nav sits above sidebar and show sub navigation based on if we are viewing the organisation or project
• The side menu will only show for environment specific pages
• Switching environments is done via a select vs showing them all as a collapsable list
• The top nav has a breadcrumb and menu allowing users to navigate to any organisation or project
• Clicking home will go to an organisation select page
• Users and permissions and usage is separated from settings at the organisation level
• Settings / usage links are restricted to organisation admin
• Reduces font sizes in some places
• Moves SDK keys to top level navigation
• Dev experience: Migrates some components to RTK and TypeScript
• Dev experience: removes a lot of custom css
• Minor: Remove unused images

How did you test this code?

Please describe.

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[zachaysan]

All the stuff I've tested looks good. Really like this refactor.

[matthewelwell]

Seems like there's still some nasty debugging going on here. I managed to get this to appear by just navigating to project settings.

[kyle-ssg]

Figured this out, was due to tags and is an existing issue in production. This PR will resolve it.

[matthewelwell]

Confirmed above issue as fixed.

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ TypeError: Cannot read properties of undefined (reading 'tags') <object>.renderRow(web/components/pages/UserPage) View Issue

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