refactor(service): allow wildcards in service search

[drochow]

Task Description

The service search term does currently append a wildcard at start and end. Parse the string instead and replace "*" with wildcards.

Acceptance Criteria:

• Wildcards can get dynamically be added
• Multiple wildcards are possible
• Providing NO wildcard does result in an exact term search

Expected Test:

• Existing tests should break, as functionality changes
• Add tests for:
  • multiple wildcards
  • single wildcards
  • exact term