improve error for unsupported model kinds

[ElijahAhianyo]

Not ready for review

Description

Checklist

• I have updated the documentation accordingly
• I have added tests that cover my changes
• I have run cargo fmt and cargo clippy to ensure code quality
• All default tests pass (cargo test)

• cargo test --features gams passes (requires GAMS)
• cargo test --features gurobi passes (requires Gurobi)
• cargo test --features mosek passes (requires MOSEK)
• cargo test --features baron passes (requires BARON)

Changes Made

Related Issues

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