feat: add first set of seeds tokens

[emilyjablonski]

This PR addresses bloom-housing#4485

• Addresses the issue in full

Description

Adds the first set of Seeds tokens, will will theme colors, fonts, and buttons where Seeds exists in core.

How Can This Be Tested/Reviewed?

Check out the public site deploy preview! We'll have very partial theming.

Author Checklist:

• Added QA notes to the issue with applicable URLs
• Reviewed in a desktop view
• Reviewed in a mobile view
• Reviewed considering accessibility
• Added tests covering the changes
• Made corresponding changes to the documentation
• Ran yarn generate:client and/or created a migration when required

Review Process:

• Read and understand the issue
• Ensure the author has added QA notes
• Review the code itself from a style point of view
• Pull the changes down locally and test that the acceptance criteria is met
• Either (1) explicitly ask a clarifying question, (2) request changes, or (3) approve the PR, even if there are very small remaining changes, if you don't need to re-review after the updates

[netlify]

✅ Deploy Preview for bloom-detroit ready!

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[netlify]

✅ Deploy Preview for bloom-detroit-partners ready!

Name	Link
🔨 Latest commit	1f9fadd
🔍 Latest deploy log	https://app.netlify.com/sites/bloom-detroit-partners/deploys/6744f39dc5d7f80008b8d169
😎 Deploy Preview	https://deploy-preview-4--bloom-detroit-partners.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

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