Add twitter to automation platform list

[gaspergrom]

Changes proposed ✍️

What

🤖 Generated by Copilot at ff1dcd4

This pull request adds a temporary option for Twitter in the new activity filter options component, and refactors some common logic for platform selection in both the new member and new activity filter options components. This is to enable testing the Twitter integration and improve code reuse.
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🤖 Generated by Copilot at ff1dcd4

computedPlatformOptions
Twitter added for testing
a temporary fix

Why

How

🤖 Generated by Copilot at ff1dcd4

• Add a hardcoded option for Twitter to the platform dropdown menu in the new activity filter options component (link)
• Refactor the filter options components to use a common base component and props, and copy the logic for computing and getting platform details from the new member filter options component to the new activity filter options component (link, 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.