Orion Events: improve error message when invalid keyword or field name is used

[kriben]

Goal

Show the list of named parameters (items) for an OPM Flow / Eclipse keyword inside ResInsight — e.g. that COMPDAT has WELL, I, J, K1, K2, STATE, SAT_TABLE, CONNECTION_TRANSMISSIBILITY_FACTOR, DIAMETER, Kh, SKIN, D_FACTOR, DIR, PR.

Constraint: all information must come from opm-common only.

Proposed approach: query the parser we already link

ResInsight already links custom-opm-common, and ThirdParty/custom-opm-common/generated-opm-common/ParserInit.cpp registers 1121 keywords with full item metadata. Opm::Parser is already in use in ApplicationLibCode/ProjectDataModel/RiaOpmParserTools.cpp.

So the parameter names are already compiled into the binary — we only need an accessor layer. No new data file, no resource to keep in sync, and by construction nothing manual-derived enters ResInsight.

Sketch

New tools file, e.g. RiaOpmKeywordTools, next to RiaOpmParserTools:

struct RiaOpmKeywordItem
{
    QString name;
    QString typeName;      // "INT" | "DOUBLE" | "STRING" | "RAW_STRING" | "UDA"
    QString dimension;     // joined item.dimensions(), may be empty
    QString defaultValue;  // empty if no default
    QString description;   // usually empty - opm-common rarely sets it
    bool    isVariadic;    // sizeType() == item_size::ALL
};

struct RiaOpmKeywordRecord
{
    std::vector<RiaOpmKeywordItem> items;
};

struct RiaOpmKeywordInfo
{
    QString                          name;
    std::vector<QString>             validSections;
    std::vector<RiaOpmKeywordRecord> records;   // >1 for WELSEGS, VFPPROD, ...
    bool                             isDataKeyword;
};

namespace RiaOpmKeywordTools
{
std::vector<QString>             allKeywordNames();
std::optional<RiaOpmKeywordInfo> keywordInfo( const QString& keywordName );
} // namespace RiaOpmKeywordTools

Implementation notes / traps

1. Share one Opm::Parser. Construction runs 1121 keyword constructors, so build it once lazily:

   static const Opm::Parser& sharedParser()
   {
       static const Opm::Parser parser( true ); // true = add default keywords
       return parser;
   }

2. Enumerate via getAllDeckNames(). The keyword store is private; this is the only public enumeration. It returns deck names (so aliases such as DIFFMR- appear alongside the canonical keyword) plus wildcard entries, in hash-map order — sort and dedupe before display.

3. Resolve with getParserKeywordFromDeckName() rather than getKeyword() when the input may be a deck alias. Guard with isRecognizedKeyword() — both throw on a miss.

4. Walk with range-for. ParserKeyword iterates its records, ParserRecord iterates its items.

5. Dispatch defaults strictly on dataType(). getDefault<T>() throws std::invalid_argument when T does not match the item's tag. Two specific traps:

   • ParserItem::to_string() throws for UDA — write our own switch instead.
   • getDefault<RawString> has no explicit template instantiation in the library, so using it on a raw_string item is a link error. Treat that case as "no default".