Elektra: Use Case: View details for specific configuration snippet

Elektra 0.8.24

Use Case: View details for specific configuration snippet

## Summary

- Title: View details for specific configuration snippet
- Scope: Entry Details
- Level: User Goal
- Actors: Anonymous user (+ all others)
- Brief: Any user can view all details about an entry (configuration snippet).

## Scenarios

- Preconditions: Snippet has been found through search or URI is known
- Main success scenario: User sees detailed information of the requested entry, including tags and other meta information like a description, as well as the configuration snippet converted into all supported formats.
- Alternative scenario: The requested entry (URI) cannot be found, therefore the server responds with an error which is displayed to the user. If necessary, the user is redirected to the snippet overview.
- Error scenario: Technical problems prevent server from responding with detailed information. The user is informed about the issue.
- Postcondition: The database remains unchanged.
- Non-functional Constraints:
  - Essential functionality of the program