#42 WIP Study static information

[KijongHan]

I would like to get some feedback as to whether I am on the right track.

-Added rest endpoint for retrieving all necessary information for "static study information" - contained within the StaticInfoDTO class -Added faq field. I'm unsure how the static study information page is going to look so please give some suggestions

[softeng-701]

@KijongHan Please stash your commits, thanks!

[softeng-701]

@KijongHan Please resolve the conflicts!

[KijongHan]

This PR implements the basic groundwork implementation outlined in issue #42. It involves both front-end and back-end changes.

Back-end Changes

Database/Entities

• A Document entity added to domain; stores Base64 encoded string of a file and other file attributes
• Study entity updated to include FAQ field and include a one-to-many relationship with Document entity
• Added a StudyInfoDTO entity (Not saved to database) that encapsulates all the necessary information from the Study entity that will be returned to the viewer of the "Study static information" (The idea is that developers can control what Study information is available and what should require authentication)

REST API

• Add DocumentResource and add API endpoint for downloading a Document file
• Add API endpoint for retrieving StudyInfoDTO entity

Security

• Add document download and study info request paths to security configuration pipeline so that they don't require authentication

Front-end Changes

Study Dialog Component

• Add a faq textarea field and a documents select field for the study creator to edit (Note that the faq field in the static study information page doesn't filter html input. The idea is that maybe later on study creators can edit the page more freely using a WYSIWYG editor. FAQ field needs to be sanitized from malicious html input, but I figured that's a pretty big implementation on its own)
• Can upload documents and remove documents

Study Information Page

• Static page for study information, open publicly, showing basic information
• Can download documents from this page
• (Note that at the moment, in the perspective of the study creator, the page can only be manually accessed by editing the brower URL field, as the studies table is looking really crowded at the moment and so didn't want to overpopulate it. url for accessing study info is: /study/{id}/info)

[KijongHan]

@crat019 - Correct handling of "not found resources" has been addressed! @dylHall - Document storage has been addressed!

@softeng-701 commits have been squashed!