pounce-nlp 0.4.0

NLP-side glue for POUNCE (port of Ipopt's src/Interfaces): TNLP trait, TNLPAdapter, NLP / IpoptNLP wrappers, return-code enums, IpoptApplication user-facing entry point.
Documentation 
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//! Algorithm-side termination codes.
//!
//! Mirrors `Interfaces/IpAlgTypes.hpp`. `SolverReturn` is what
//! `IpoptAlg::Optimize()` returns; `IpoptApplication` then translates
//! it (per the table in `MAIN_LOOP.md`) into a public-facing
//! [`crate::return_codes::ApplicationReturnStatus`].

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum SolverReturn {
    Success,
    MaxiterExceeded,
    CpuTimeExceeded,
    WallTimeExceeded,
    StopAtTinyStep,
    StopAtAcceptablePoint,
    LocalInfeasibility,
    UserRequestedStop,
    FeasiblePointFound,
    DivergingIterates,
    RestorationFailure,
    ErrorInStepComputation,
    InvalidNumberDetected,
    TooFewDegreesOfFreedom,
    InvalidOption,
    OutOfMemory,
    InternalError,
    Unassigned,
}