[Core] Improve UX when defining template of a Component

[alxbilger]

To get rid of the template keyword when defining a Component. Example:

<Node name="root">
    <RequiredPlugin pluginName="Sofa.Component.StateContainer"/>
    <RequiredPlugin pluginName='Sofa.Component.LinearSolver.Direct'/>

    <MechanicalObject dofType="Vec2d"/>
    <SparseLDLSolver matrixType="CompressedRowSparseMatrixMat3x3d"/>
</Node>

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[damienmarchal]

Hello,

+1 for proposing a path to remove the "template" keyword.
But I have the impression you are considering to add aliases. In the past, aliases caused a huge amount of trouble, because people have to discover them and when looking at scene must "know" by heart the aliases to understand the scenes. Having a single name is much better as it ease learning and discoverability.