Add "ce" type to projectionist.json.example

What does this MR do and why?

Similar to what was done in !85257 (merged), add the "ce" type to projectionist. This enables projectionist users to open CE version of files from EE files, like:

Screen_Recording_2022-10-18_at_17.21.40

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

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