[WIP] Improve include/exclude list value management in Add/Edit modals

[zackcl]

Resolves #3256

Summary

Implements the modal-based value management design proposed in #3256.

• Replaces the chip-based editor with a searchable, row-based table
• Supports adding, editing, deleting, importing, and exporting values
• Keeps changes staged until the user selects Create or Save
• Uses the same behavior across Add/Edit Include List and Exclude List modals
• Preserves existing values when editing partially loaded lists

Key behavior

• Values can be entered manually, pasted, or imported from CSV
• Imported values are placed in the Values field for review
• Selecting Add (+) or pressing Enter commits pending values to the table
• Search is always available and the table header displays the total count
• Export includes the complete list regardless of the active search
• The table displays up to four rows before becoming scrollable

Intentional differences from #3256

Based on implementation review and UX iteration:

• The Description field was removed to provide more space for value management
• The value count was moved to the Value table header
• Enter or Add (+), rather than a comma, commits pending values
• CSV imports no longer provide Add/Replace actions or modify the table immediately
• Search remains visible for lists of all sizes

Screenshot

Screen recording

larger.list.modal.mov