As this is a shared pointer, we can copy it directly without performance
issue.

test: insert ccputest headers after all other dependencies to prevent build issue with glibmm/bytes.h and not found name std::nothrow

The issue is FakeIt is not any more compatible with Catch2 and Catch2
will move to a new major release soon.

Note: it requires "Meson" and "Native Debug" extensions

This function creates the parser, connect the client to its signals
and start reading the xmpp input stream.

To avoid the thread to consume too many CPU, it waits for some
milliseconds between each stream reading.

actually, we can't restart document, so we can't bind the stream.

we'll need to split Sax Parser from the client.