Fix rendering of custom platforms in org list

[gaspergrom]

Changes proposed ✍️

What

🤖 Generated by Copilot at 840d6d2

Added optional chaining to getPlatformDetails calls and custom icon class prop to PlatformIcon component. This improves error handling and UI for community platforms as identity sources.
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🤖 Generated by Copilot at 840d6d2

getPlatformDetails?
No error if not found now
Autumn leaves falling

Why

How

🤖 Generated by Copilot at 840d6d2

• Add optional chaining operator to prevent errors when platform is not found and allow custom icon class for community platform (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.