[FEA] Add cuOpt skills to repo for better agentic support

[rgsl888prabhu]

Soon will update with list of items we can pursue

[github-actions]

🔔 Hi @anandhkb @Iroy30 @rgsl888prabhu, this issue has had no activity for 21 days. Please update or let us know if it can be closed. Thank you!

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[anandhkb]

@rgsl888prabhu You added the skills.md files for LP, MILP, QP and CVRP.

[anandhkb]

Closed by #818

@rgsl888prabhu Please open new issue for 26.04 skills work