* Remove `getSelectedQtInstallationPath()` use `getSelectedKit()` instead
Since we support both root installation kits and qtpaths, we cannot just
return the installation path of the selected kit. We need to return
the all kit information.
* Use only qtpaths exe paths to cache information
Since we store only qtpaths exe paths in `cmake-kits.json`, we don't
need to hash it with other values like name or isVCPKG. And also, we can
improving the performance by caching different kits but with the same
qtpaths.
* Implement `qt-cpp.qtDir` for debug templates on Windows
We have to return possible dll paths for qtpaths kits.
* Deprecate `qt-cpp.kitDirectory` and use `qt-cpp.qtDir` instead
We support both root installation kits and qtpaths. So we cannot just
rely on `qt-cpp.kitDirectory\bin` in debug templates. For qtpaths, we
need to return multiple paths.
* Remove `kit-directory.ts` and move content to `launch-variables.ts`
* Add `qt-cpp.qpaPlatfromPluginPath`
When we debug with Qt from vcpkg. We get the
`could not find or load the Qt platform plugin "windows" in "",` error
if we don't set the `QT_QPA_PLATFORM_PLUGIN_PATH` environment variable.
That's why we need to set `qt-cpp.qpaPlatfromPluginPath` according to
`cmake.buildType` either `debug` or `release` path.
* Locate Designer via qtpaths
To support using Designer from qtpaths, we need to locate the Designer
inside paths like `QT_HOST_BINS`, `QT_HOST_LIBEXECS`,
`QT_INSTALL_LIBEXECS`
* Remove error messages when a qtpaths kit selected
In the previous implementation, we showed an error message when a
qtpaths kit selected instead of root installation kits.
* Add Qt version detection from qtpaths
* Add selectedQtPaths to coreAPI
When a qtpaths kit is selected, we set `selectedQtPaths` to inform
other extensions.
* Move `queryHostBinDirPath` to `qt-ui/util.ts`
Since it is only used in `qt-ui`, we move it to `qt-ui/util.ts`
* Shorten `locateQtDesignerExePath()` to `locateDesigner()`
* Use `set designerClient()` and detach inside it
It is better encapsulation.
Task-number: VSCODEEXT-86
Task-number: VSCODEEXT-93
Task-number: VSCODEEXT-92
Change-Id: I0aadd4dd5e2f9508576dda70d24eb14de7796a86
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>