Reorganise components for exporting

[kgpax]

What does this PR do

Reorganises component files so that one which we will (eventually) look to expose to users creating their own systems are in the /src/components/ folder, whereas ones which we don't want to expose (and which are used for fundamental parts of the user interface) are in the /src/components/ui folder.

[changeset-bot]

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Latest commit: c1d734e

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