chore(local-explorer-ui): Switch to Kumo color palette

[NuroDev]

Fixes DEVX-2539.

Summary

This change overhauls the existing custom design, styles and colors of the local explorer to instead use most if not all of the Kumo styles and colors when possible.

Screenshots

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• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because: Behaviour tests are due to be added in the future.
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: WIP Experimental feature

A picture of a cute animal (not mandatory, but encouraged)

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[changeset-bot]

🦋 Changeset detected

Latest commit: 86efd9a

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commit: 86efd9a

[github-actions]

✅ All changesets look good

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[emily-shen]

Kumo has a lint rule that flags tailwind primitives and suggests kumo versions, can we apply that? https://github.com/cloudflare/kumo/blob/main/lint/no-primitive-colors.js

also i think we need to change how we do dark mode handling as outlined here: https://kumo-ui.com/colors/
since we have a lot of dark: variants still, which is not recommended since it should be handled automatically - they seem to have a lint rule for that too.

[emily-shen]

also i think the syntax colour highlighting has broken in the SQL editor

[devin-ai-integration]

Devin Review found 1 new potential issue.

View 17 additional findings in Devin Review.

[NuroDev]

Kumo has a lint rule that flags tailwind primitives and suggests kumo versions, can we apply that? https://github.com/cloudflare/kumo/blob/main/lint/no-primitive-colors.js

also i think we need to change how we do dark mode handling as outlined here: https://kumo-ui.com/colors/ since we have a lot of dark: variants still, which is not recommended since it should be handled automatically - they seem to have a lint rule for that too.

I've gone ahead and remove all the existing dark:* variants, but I am going to add the linting rule in a later to keep this PR in scope.

[workers-devprod]

Codeowners reviews satisfied