Feature: Extract inline assets

[jeppekroghitk]

Link to ticket

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Description

Extracted inline assets - serve using webpack.
Extended base twig to include new assets.
Improved qr batch download previewer to serve previews for all qrs to be downloaded.

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Checklist

• My code is covered by test cases.
• My code passes our test (all our tests).
• My code passes our static analysis suite.
• My code passes our continuous integration process.

If your code does not pass all the requirements on the checklist you have to add a comment explaining why this change
should be exempt from the list.

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