cmake names for qml plugins

i'm trying to use the cmake targets for qml plugins with statically linked qt. however i'm facing challenges to find out the names of a specific plugin.

the first issue i'm having is a documentation issue: i did not find out which cmake targets to link to. for c++ classes this is in the docs (e.g. https://doc-snapshots.qt.io/qt6-dev/qbuffer.html), for qml classes it only mentions the import statement (https://doc-snapshots.qt.io/qt6-dev/qml-qtquick-layouts-rowlayout.html)

the second issue i'm seeing is a lack of consistency among the qml plugins:

• `Qt.labs.animation` is `Qt6::labsanimationplugin`
• `Qt.labs.sharedimage` is `Qt6::sharedimageplugin`
• `Qt.labs.wavefrontmesh` is `Qt6::qmlwavefrontmeshplugin`
• `QtQml.Models` is `Qt6::modelsplugin`
• `QtQuick.Controls` is `Qt6::qtquickcontrols2plugin`
• `QtQuick.Dialogs` correspondst to `Qt6::qtquickdialogsplugin`
• `QtQuick.Layouts` is `Qt6::qquicklayoutsplugin`
• `QtQuick.Shapes` is `Qt6::qmlshapesplugin`
• `QtQuick.Templates` is `Qt6::qtquicktemplates2plugin`
• `QtQuick.Window` is `Qt6::quickwindow`

so there are various prefixes ("labs", "qml", "qtquick", "qquick"). sometimes there's a version specifier (with Controls and Templates). usually there's a "plugin" suffix, but not always.

third issue: the `_init` plugins to auto-load the plugin targets are not pulled in as usage requirement of the plugins. linking qml plugins without auto-loading is quite useless imho

and last issue: the plugins don't carry dependencies. afaict `QtQml.Models` for example is pulled at dependency (of QtQml and QtQuick). however i explicitly need to link both `Qt6::modelsplugin` and `Qt6::modelsplugin_init` explicitly to resolve the dependency

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i know that the qml import scanner takes care of this under the hood and it's super convenient to use: but it significantly increases the cmake execution times, when using multiple (dozens) of targets, as for each target the import scanner takes 10-15 seconds