Following the merge of https://github.com/bitcoin/bitcoin/pull/23083, we'll throw a non-fatal error at runtime if the documentation for an RPC is incorrect. This behaviour has found numerous issues over a very short period (of the PR being opened). However, this is not something that we want in production / release builds, instead, we want the ability to have it enabled in the CI and when running tests. A runtime option could be added, which controls this behaviour (disabled by default).

#### Useful skills:

- C++
- Understanding of Bitcoin Core's initialization sequence
- Understanding of Bitcoin Core's RPC interface

#### Want to work on this issue?

For guidance on contributing, please read [CONTRIBUTING.md](https://github.com/bitcoin/bitcoin/blob/master/CONTRIBUTING.md) before opening your pull request.

case Type::ARR:
        res += "[";
        for (const auto& i : m_inner) {
            res += i.ToString(oneline) + ",";
        }
        return res + "...]";
    case Type::OBJ:
    case Type::OBJ_USER_KEYS:
        
        NONFATAL_UNREACHABLE();
    } 
    NONFATAL_UNREACHABLE();
}
std::string RPCArg::ToString(const bool oneline) const
{
    if (oneline && !m_oneline_description.empty()) return m_oneline_description;
    switch (m_type) {
    case Type::STR_HEX:
    case Type::STR: {
        return "\"" + GetFirstName() + "\"";
    }
    case Type::NUM:
    case Type::RANGE:
    case Type::AMOUNT:
    case Type::BOOL: {
        return GetFirstName();
    }
    case Type::OBJ:
    case Type::OBJ_USER_KEYS: {
        const std::string res = Join(m_inner, ",", [&](const RPCArg& i) { return i.ToStringObj(oneline); });