docs: add dynamic date range filtering examples to WHERE clause

[MeelahMe]

Closes #4852

• Add "Filter data by dynamic date ranges" section with three practical examples
• Include yesterday, last 24 hours, and current week filtering patterns
• Use NOW(), DATE_TRUNC(), and INTERVAL functions for relative time periods
• Add query explanations in expandable sections for clarity

[Copilot]

Pull Request Overview

This PR adds documentation for dynamic date range filtering in SQL WHERE clauses, providing practical examples for querying time-series data with relative time periods. The addition helps users understand how to create queries that automatically adjust based on the current time.

Key changes:

• Adds three new examples for dynamic date filtering: yesterday, last 24 hours, and current week
• Incorporates SQL time functions like NOW(), DATE_TRUNC(), and INTERVAL for relative time calculations
• Includes explanatory content in expandable sections to clarify the logic behind each query