Fix: Complete dark theme support for TableViewerWidget

[YaxitaAmin]

Related Issue
Fixes #660

Description of Changes

• Added robust dark theme detection using CSS classes, data attributes, media queries, and CSS variables, with real-time updates via MutationObservers and event listeners.
• Imported and applied ag-theme-alpine-dark stylesheet to support dark mode styling in the grid.
• Enhanced cell, header, and row styling to dynamically adapt to light and dark themes, including alternating row colors and improved no-data state visuals.
• Improved performance by memoizing column definitions and row data processing with useMemo, and stabilizing functions with useCallback.
• Added advanced column filter options and grid features such as range selection and popup handling for better usability.
• Refactored component structure for better readability, maintainability, and flexibility.
• Ensured columns auto-size correctly on grid initialization and theme changes.

Type of Change

• Bug fix (non-breaking change which fixes an issue)

Testing

tested.mp4

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have run my code against examples and ensured no errors
• Any dependent changes have been merged and published in downstream modules