Select multiple values for pipeline inputs

Previously, you could only select a single value when selecting input options in the UI, limiting flexibility for pipelines with more complex options.

Now when you run a pipeline with inputs from the UI, you can select multiple values from a dropdown list and the selected values are combined into an array, for example ["option1","option2"]. This makes it easy to restart services on multiple instances, build multiple Docker images, run tests with multiple tag combinations, or perform any operation across multiple targets in a single pipeline run.