Feature/comp 205 create survey datamodel

• Creates the basic datamodel for the questions and answers.
• Added very basic dev functionality for saving and retrieving the answers for a hardcoded year and nren. A dummy questions entry is inserted as needed, the questions are still read from file for now.
• Note that the endpoints do not have unittests yet, as the functionality is still quite different from what it should be eventually.

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• 2c5d6487 - new bundle

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• 02268529 - review comments

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resolved all threads

mentioned in commit 2cb54618

merged