hikogui

We've updated the CMake files quite a bit to improve installation with vcpkg:

Use RESOURCE property to install resource files. Add functions to inherit RESOURCE files from a library, so that they will be installed along side an application. Change HikoGUI's path module to use separate functions for getting locations to files and directories. *_file(), *_dir(), *_dirs(). An application and th...

HikoGUI is now temporarily a header-only library. This is in preparation of making it a module-only library. This required a lot of work to untangle the many circular dependencies.

With modules it is now much easier to switch out different implementations of classes and functions, so I've de-virtualized the GFX and GUI parts of the library. This means that a win32-window and a X11-window ar...

To make it possible to select and configure audio devices this release is a start to make composable shared-state, composable preferences and composable widgets.

There are also a few other systems that have been updated:

• Co-routine; awaiting on a timeout.
• Simplified widget event handling.
• The color type can hold a RGBA color value or be a semantic enum value.
• Handle HDR on...

The changes in this version are pretty random, but there is a theme of improving how to create custom widgets.

• The ttauri project is renamed to HikoGUI.
• The drawing API is more consistent and capable; for example adding color gradients, convex quads and allowing glyphs to be overlapped.
• New text-shaper and text widget which handles bidirectional text, with bidirectional-doub...

• Fix bug: pre-main initialization order of global_counter.
• Make it easier to build out-of-tree application without vcpkg.
• vcpkg builds are not recommended at the moment due to future changes of std::format and std::ranges to the c++20 standard. Please build using non-vcpkg to ensure equal versions of cmake and the compiler.