Add filter to include/exclude tags

[Added]
- Introduced a tag filter feature allowing users to specify whether tags should be included or excluded in time entry filters. This supports 'contains' and 'not_contains' modes.

app/Http/Requests/V1/TimeEntry/TimeEntryAggregateRequest.php

@@ -125,6 +125,10 @@ class TimeEntryAggregateRequest extends BaseFormRequest
                     })->uuid()->validate($attribute, $value, $fail);
                 },
             ],
+            'tag_filter' => [
+                'string',
+                'in:'.TimeEntryFilter::TAG_FILTER_CONTAINS.','.TimeEntryFilter::TAG_FILTER_NOT_CONTAINS,
+            ],
             // Filter by task IDs, task IDs are OR combined
             'task_ids' => [
                 'array',