App Provider

[elizavetaRa]

Description

Added the function to open files of certain mimetypes with corresponding apps

Related Issue

cs3org/reva#1923

How Has This Been Tested?

• test environment: qa.cernbox.cern.ch
• test case: opening different files with Collabora and CodiMD

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• [ x] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests

Checklist:

• [x ] Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:

Done

• Mimetypes list with applications gets retrieved on opening the frontend
• The corresponding to the file mimetype apps are shown in the sidebar actions and the context menu actions
• View for the applications opens in the new tab (new route apps/:app/:file_id), iframe with the app

Open tasks:

• make a package for appprovider instead of implementation in the web-app-files package
• Sharing button (opens sidebar sharing menu) in the top-bar in the application tab
• Create files with different extensions and on creation open them with default application
• (backend, in progress) default apps are first in the mimetypes list
• (backend, in progress) fix bugs with Collabora, CodiMD, MS Office

[update-docs]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[pascalwengerter]

@elizavetaRa could you drop the CERN-specific stuff from this PR (e.g. feedback button in the left navbar) and add a "definition of done" for this PR?

[pascalwengerter]

Closed in favor of #5805