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refactor(core): Improve performance of registry lookups

The current implementation of the Registry classes uses a naive Map as backing store, using composite keys (lists of strings). This has shown as a performance bottle-neck on older mobile devices which affects overall performance significantly as uiFor is in heavy use and it reads the registries constantly. This is especially impactful if the application uses composite element kinds with more than a few entries.

This pull request reimplements these registries with a much faster Trie-based backing store.

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