Update Feature Flags for new plans

[yeganathan18]

Changes proposed ✍️

What

🤖 Generated by Copilot at 9227f4e

Removed the COMMUNITY_HELP_CENTER_PRO feature flag and made the custom URL feature available to all plans. Adjusted some other feature flag limits based on user feedback and market research.
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🤖 Generated by Copilot at 9227f4e

COMMUNITY_HELP_CENTER_PRO
Gone with the autumn wind
Custom URL for all

Why

How

🤖 Generated by Copilot at 9227f4e

• Remove deprecated feature flag for custom URL and make it available to all plans (link, link)
• Remove plan limits for enrichment features and make them free and unlimited for all plans (link)
• Reduce plan limits for automations and CSV export features for the scale plan (link)
• Update conversationSettingsUpdate.ts to remove unused imports and conditional check (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.