Switch example product package.json to extension pack #166
Description
Once eclipse-theia/theia-ide#93 is done, we should switch the product config example (https://theia-ide.org/docs/composing_applications/) to the extension pack.
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Once eclipse-theia/theia-ide#93 is done, we should switch the product config example (https://theia-ide.org/docs/composing_applications/) to the extension pack.