…#1579)

Co-authored-by: Jordan Bayles <[email protected]>

Co-authored-by: Jordan Bayles <[email protected]>

* Assume C++11

We already assume C++11 elsewhere, so all pre-11 `#ifdef` branches are
dead code at this point. Fixes issue open-source-parsers#1591 because we can just use
`std::isfinite` etc.

assume C++11 in json_reader.cpp as well

apply clang-format

* valueToString: simplify lookup of special float name

This adds direct support for `std::string_view` when available (C++17
and above). The current API can be used with `std::string_view` via the
low-level two-pointer methods, but is not ergonomic. E.g., compare:

```
Json::Value node;
std::string foo, bar, baz;
std::string_view foo_sv, bar_sv, baz_sv;

// Efficient & readable:
node[foo][bar][baz];
// Less efficient, less readable:
node[std::string(foo_sv)][std::string(bar_sv)][std::string(baz_sv)];
// Efficient, but a lot less readable:
*node.demand(foo_sv.data(), foo_sv.data() + foo_sv.size())
    ->demand(bar_sv.data(), bar_sv.data() + bar_sv.size())
    ->demand(baz_sv.data(), baz_sv.data() + baz_sv.size())
// After this change, efficient & readable:
node[foo_sv][bar_sv][baz_sv];
```

*   The constructor can take a `std::string_view` parameter. The existing
    overloads taking `const std::string&` and `const char*` are still necessary
    to support assignment from those types.
*   `operator[]`, `get()`, `isMember()` and `removeMember()` take a
    `std::string_view` parameter. This supersedes the overloads taking
    `const std::string&` and `const char*`. The overloads taking a pair of
    pointers (begin, end) are preserved for source compatibility.
*   `getString()` has an overload with a `std::string_view` output parameter.
    The one with a pair of pointers is preserved for source compatibility.

Signed-off-by: Lev Kandel <[email protected]>
Co-authored-by: Jordan Bayles <[email protected]>

This adds a convenience function to return a member if it has a specific
json type. All isType values are supported.

Co-authored-by: Jordan Bayles <[email protected]>

* Set up for Bazel module builds.

Note: the MODULE.bazel is copied from https://github.com/bazelbuild/bazel-central-registry/blob/main/modules/jsoncpp/1.9.6/MODULE.bazel

* More tweaks to .gitignore