FEAT: Add showOnlyOneOption prop to list and dropdown list components (#1451)

[Talha12Shiekh]

Proposed Changes

Adds a new boolean prop showOnlyOneOption to dynamic list and dropdown list components to allow developers to conditionally hide filters when they do not offer choice (e.g. have only 1 option or 0 options):

1. Conditional Hiding: When showOnlyOneOption is set to false, the component automatically renders null if the options count is less than or equal to 1.
2. Components Supported:
   • MultiList
   • SingleList
   • MultiDropdownList
   • SingleDropdownList
3. Types & Prop Contracts: Added showOnlyOneOption prop definition in each component's propTypes, defaultProps, and type declarations (.d.ts).

Linked Issues

• Fixes Hide component when only 1 option is available #1451 (hide filters when there is only 1 option)

Usage Example:

// Hide the filter if only 1 option (or 0 options) is returned from the Elasticsearch aggregation
<MultiList
  componentId="CategorySensor"
  dataField="category.keyword"
  showOnlyOneOption={false}
/>

Checklist

• Describe the proposed changes and how it'll improve the library experience.
• Please make sure that there are no linting errors in the code.
• Add a demo video/gif/screenshot to explain how did you test the fix.
• If it is a global change, try to add any side effects that it could have.
• Create a PR to add/update the docs (if needed) at here.
• Create a PR to add/update the storybook (if needed) at here.

Improvements to the Library Experience

• Smarter UI Design: Prevents displaying redundant and useless search filters that only have a single selectable option, saving screen real estate and improving user experience.

Side Effects

• None. Default behavior remains unchanged (showOnlyOneOption defaults to true).

Testing

• Built successfully using Babel (yarn build) without compilation or runtime syntax errors.