add chart color for discourse

[garrrikkotua]

Changes proposed ✍️

What

🤖 Generated by Copilot at eaa0c85

Added chartColor property to discourse integration config to customize the dashboard chart. This is part of the new feature that connects crowd.dev projects with Discourse forums.
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🤖 Generated by Copilot at eaa0c85

chartColor added
Discourse integration shines
Yellow like autumn

Why

How

🤖 Generated by Copilot at eaa0c85

• Add chartColor property to discourse integration config object with yellow hex value (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.