feat: view E2EE files

[luka-nextcloud]

📝 Summary

• Resolves: Viewing E2EE files #6934

🖼️ Screenshots

🏚️ Before

🏡 After

🏁 Checklist

• Code is properly formatted (npm run lint / npm run stylelint / composer run cs:check)
• Sign-off message is added to all commits
• Tests (unit, integration and/or end-to-end) passing and the changes are covered with tests
• Documentation (README or documentation) has been updated or is not required

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 31 lines in your changes missing coverage. Please review.

Project coverage is 58.58%. Comparing base (b04381e) to head (13af688).
Report is 17 commits behind head on main.

Files with missing lines	Patch %	Lines
src/components/ViewerComponent.vue	0.00%	30 Missing ⚠️
src/helpers/mime.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7132      +/-   ##
==========================================
+ Coverage   51.87%   58.58%   +6.71%     
==========================================
  Files         479      478       -1     
  Lines       41567    36802    -4765     
  Branches     1002     1001       -1     
==========================================
- Hits        21561    21560       -1     
+ Misses      19901    15138    -4763     
+ Partials      105      104       -1     

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[juliusknorr]

Tested and works