Add time picker

[dword-design-honestly]

Clear and concise description of the problem

BootstrapVue has a time picker component with styling integrated into the Bootstrap theme. Would be great to have this guy also in bootstrap-vue-next.

Suggested solution

Migrate the time picker to this project.

Additional context

Related ticket here for a date picker including a discussion.

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.