move the WIP libraries to a category

recipes/wip/libs/qt6-shadertools/recipe.toml

recipes/wip/libs/qt6-speech/recipe.toml

recipes/wip/libs/qt6-svg/recipe.toml

recipes/wip/libs/qt6-tools/recipe.toml

recipes/wip/libs/qt6-translations/recipe.toml

recipes/wip/libs/qt6-virtualkeyboard/recipe.toml

recipes/wip/libs/qt6-wayland/recipe.toml

recipes/wip/libs/qt6-webchannel/recipe.toml

recipes/wip/libs/qt6-webengine/recipe.toml

recipes/wip/libs/qt6-websockets/recipe.toml

recipes/wip/libs/qt6-webview/recipe.toml