Provide preset value for groupby

**Is your feature request related to a problem? Please describe.**
Currently, the preset view only provides preset values for filters but not for groupby. We can provide more valuable preset views with different groupby values.

For example, we can have a preset view "My Contributions" which groups the issues and PRs by milestone and filters the assignee as the current user.

**Describe the solution you'd like**
We can have a separate `PresetViewService` to handle the value for both `FilterService` and `GroupingContextService`

**Describe alternatives you've considered**
nil

Start by tracing how preset views currently provide values through FilterService, then inspect GroupingContextService and how the two are used by preset views. Done means preset views can supply groupby values as well as filter values, supporting a view such as “My Contributions” with milestone grouping and current-user filtering.

Written by the indexing model from the issue text.