* Added hex color conversion
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Co-authored-by: Frank Ray <52075808+FrankRay78@users.noreply.github.com>
Co-authored-by: Nils Andresen <nils@nils-andresen.de>
Before this commit, the selection prompt would throw an `InvalidOperationException` (Sequence contains no elements) and the multi selection prompt would throw an `ArgumentOutOfRangeException` (Index was out of range. Must be non-negative and less than the size of the collection.)
Both would occur because the prompts were never meant to be empty.
* Move Should_Search_In_Remapped_Result into the SelectionPromptTests class where it belongs
* Use file sealed class for CustomItem, like it's done with CustomSelectionItem in the selection prompt tests
* Less cluttered solution layout.
* Move examples to a repository of its own.
* Move Roslyn analyzer to a repository of its own.
* Enable central package management.
* Clean up csproj files.
* Add README file to NuGet packages.
