Adding the --csv option to search and retrieve.

[nguyenLisa]

Also added a trait for SearchRequest and RetrieveRequest.

[codecov-io]

Codecov Report

Merging #28 into develop will not change coverage.
The diff coverage is 0%.

@@          Coverage Diff          @@
##           develop   #28   +/-   ##
=====================================
  Coverage        0%    0%           
=====================================
  Files            8     9    +1     
  Lines          173   194   +21     
  Branches        10     9    -1     
=====================================
- Misses         173   194   +21

Impacted Files	Coverage Δ
...upb/cs/swt/delphi/cli/artifacts/SearchResult.scala	0% <ø> (ø)	⬆️
...ain/scala/de/upb/cs/swt/delphi/cli/CsvOutput.scala	0% <0%> (ø)
...b/cs/swt/delphi/cli/commands/RetrieveCommand.scala	0% <0%> (ø)	⬆️
...la/de/upb/cs/swt/delphi/cli/commands/Command.scala	0% <0%> (ø)	⬆️
...ain/scala/de/upb/cs/swt/delphi/cli/DelphiCLI.scala	0% <0%> (ø)	⬆️
...upb/cs/swt/delphi/cli/commands/SearchCommand.scala	0% <0%> (ø)	⬆️

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