Add a persistence query filter implementation

[djjuhasz]

Refs #988, #514

To address #988 and provide a count of the total number of packages in the dashboard the API GET /package endpoint to provide total number of packages in a result set. Because we need to update the API and the underlying database calls, this is a good opportunity to also address #514 and add a general search implementation that allows filtering, ordering and paging results. This PR adds this general search filtering implementation with paging and ordering, and also provides a count of the total number of records matching the search criteria before paging.

• Add a persistence package filter stub implementation
• Add persistence Page and Sort structs
• Add an entgo query filter implementation
• Add methods to add page, sort, and column value filters to the ent filter implementation
• Add a timerange package for representing time ranges (i.e. a time period with a start and end time)

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 98.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 54.22%. Comparing base (9997db0) to head (6d2dbb3). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/persistence/ent/client/filter.go	98.51%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1025 +/- ## ========================================== + Coverage 53.10% 54.22% +1.11% ========================================== Files 100 103 +3 Lines 5807 5957 +150 ========================================== + Hits 3084 3230 +146 - Misses 2473 2475 +2 - Partials 250 252 +2 ```

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[jraddaoui]

@sevein I am currently at SFA, if you have some time before I get to this, I'd appreciate if you could take a look.