H-6500: Replace emoji icons in type migrations

[CiaranMn]

🌟 What is the purpose of this PR?

Replaces all emoji icons in type migrations with SVG paths. Add more SVGs hosted on the frontend.

Pre-Merge Checklist 🚀

🚢 Has this modified a publishable library?

This PR:

• does not modify any publishable blocks or libraries, or modifications do not need publishing

📜 Does this require a change to the docs?

The changes in this PR:

• are internal and do not require a docs change

🕸️ Does this require a change to the Turbo Graph?

The changes in this PR:

• do not affect the execution graph

🐾 Next steps

H-6550: Rewrite prod/staging dbs.

📹 Demo

Kapture.2026-05-29.at.14.46.04.mp4

[vercel]

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Project	Deployment	Actions	Updated (UTC)
hash	Ready	Preview, Comment	May 29, 2026 1:50pm

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
hashdotdesign-tokens	Ignored		May 29, 2026 1:50pm
petrinaut	Skipped		May 29, 2026 1:50pm

[cursor]

PR Summary

Medium Risk
Changes persisted system entity type metadata (icons and Person fields); environments need migrations reapplied for existing graphs to match, but no runtime auth or data-path logic changes.

Overview
System ontology migrations now use SVG icon URLs under /icons/types/ instead of emoji (and one legacy /types/icons/... path) for Person, Doc, flow/link/claim types, and aviation entity/link types. Person also gains titlePlural: "People" and an updated description. Matching Font Awesome Pro SVG assets are added under apps/hash-frontend/public/icons/types/ so the UI can render consistent type icons.

Follow-up work (per PR notes) may require re-running migrations on prod/staging so stored type definitions pick up the new icon values.

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[augmentcode]

🤖 Augment PR Summary

Summary: This PR replaces emoji-based ontology type icons in system-type migrations with stable SVG assets served by the frontend.

Changes:

• Updated the Person and Doc type definitions to use SVG icon paths (and added a plural title + expanded description for Person).
• Replaced Flow-related type emoji icons with /icons/types/*.svg URLs.
• Updated aviation dev types to use the same SVG icon-path convention.
• Added the referenced SVG files under apps/hash-frontend/public/icons/types.

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[augmentcode]

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