feat(insights): allow customizing result colors with data color themes

[thmsobrmlr]

Problem

Users want to be able to customize the colors in insights. Most often this is because multiple insights on the same dashboard should have the same color for the same values. See #23093 and #17593. But there are other use cases as well:

The ability to control the themes and colours of insights and dashboards would be helpful to contextualise them to end users, eg Blue for B2B , green for B2C etc.

Changes

This PR is the unstacked version of #26238, #26296, #26350 & #26522, with a recent version of master merged in and some fixes.

Summary of changes:

• adds a dataColorTheme prop to insight queries - this will allow overriding themes in insights (no UI, yet)
• adds a project setting to customize themes http://localhost:8000/project/1/settings/environment-product-analytics#data-theme
• adds a basic admin interface for data color themes http://localhost:8000/admin/posthog/datacolortheme/
• adds a storybook story for data colors http://localhost:6006/?path=/story/lemon-ui-colors--data-colors
• doesn't add a color theme adapted for color vision deficiencies - i tested the posthog default theme in various color blindness similators and deemed they work well for most cases. was told that the pm revising these colors had considered color vision deficiencies.
• adds a <ColorGlyph /> component that remembers the last valid color

How did you test this code?

[posthog-bot]

📸 UI snapshots have been updated

18 snapshot changes in total. 0 added, 18 modified, 0 deleted:

• chromium: 0 added, 18 modified, 0 deleted (diff for shard 1, diff for shard 2)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[github-actions]

Size Change: +460 B (+0.04%)

Total Size: 1.11 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	1.11 MB	+460 B (+0.04%)

_{compressed-size-action}