Elektra: Use Case: Search for configuration snippets

Elektra 0.8.24

Use Case: Search for configuration snippets

## Summary

- Title: Search for configuration snippets
- Scope: Search
- Level: User Goal
- Actors: Anonymous user (+ all others)
- Brief: Any user can use the search to lookup configuration snippets.

## Scenarios

- Precondition:
- Main success scenario: User is presented a list of possible candidates that match the entered search parameters.
- Alternative scenario: The search did not find any entry matching the given search parameters, which will result in an empty list being displayed.
- Error scenario: Technical problems prevent the search from succeeding. The user is informed about the issue.
- Postcondition: The search results offer additional functionality like downloading of configuration snippets or detailed view.
- Non-functional Constraints:
  - Essential functionality of the program