2686 - ids-dropdown listbox fix display of 0-value

[clayinfor]

Explain the details for making this change. What existing problem does the pull request solve?

Add example to test this ticket which points out a bug where 0-indexed values are not being properly displayed in ids-dropdown.

Related github/jira issue(s) (required):

Related: infor-design/enterprise-wc#2686
Main PR: infor-design/enterprise-wc#2821

Steps necessary to review your pull request (required):

1. Check out branch 2686-dropdown-listbox-display-0-value from this repository: https://github.com/infor-design/enterprise-wc-examples
2. Then run: npm install
3. Then run: rm -fr .angular/cache && nvm i && nvm use && npm run build && npm run start
4. Then see IDS Dropdown 0-indexed examples here: http://localhost:4200/ids-reactive-forms/example
5. Keep clicking the Update Values button and ensure new dropdown cycles through each option without ever skipping the first 0-indexed value.

Included in this Pull Request:

• Added IDS Dropdown 0-indexed example to http://localhost:4200/ids-reactive-forms/example