Add date filters to search page

[simonw]

Add support for from:YYYY-MM-DD and to:YYYY-MM-DD clauses in search queries to filter results by created date.

• Parsing Date Clauses:

  • Add parse_date_clauses function to extract from and to date clauses from the search query and convert them to datetime.date objects.
  • Strip from and to date clauses from the search query.

• Search Function:

  • Modify the search function to call parse_date_clauses and handle from and to dates.
  • Filter search results by created__gte and created__lt using the parsed from and to dates.
  • Update the selected dictionary to include from_date and to_date.
  • Update the dynamic title to include the date range if from_date or to_date is present.

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For more details, open the Copilot Workspace session.