Fix almost every warning as of Clang 19
* <codecvt> is deprecated, we can use QString's UTF-16 conversion
instead
* remove sem_timedwait implementation as we don't need it anymore
* remove a useless shift that has its result discarded
* change usages of deprecated sprintf to snprintf
non-exhaustive (but exhausting) list of changes:
* base laid for multiple window support, but will likely require more work to work correctly
* encapsulation of frontend state for proper multi-instance support
* (JIT still needs a fix for the NDS::Current workaround but we can get there later)
* new, more flexible configuration system
* Reorganize namespaces
- Most types are now moved into the `melonDS` namespace
- Only good chance to do this for a while, since a big refactor is next
* Fix the build
Free some objects that were allocated with new but not deleted, and in
one case, do not set a pointer to nullptr before deleting, as this
results in a memory leak due to memory allocated not being freed.
In QCamera in Qt 5, the camera is required to have been loaded before
querying its settings and resolutions. Doing so without loading being
finished would result in the returned list being empty.
See https://doc.qt.io/qt-5.15/qcamera.html#supportedViewfinderSettings
Add a QEventLoop that waits for the state to change from Loading to
Loaded before supportedViewfinderSettings() is called to ensure that
valid information is returned.
(Fixes my camera being blank in preview, same issue also presumed
to occur when camera is needed in game, fix tested on a USB camera on
a Linux system and Qt 5.)
