/manifest: safe wrapper around player.insert() with optional quality

Usage:

/manifest [quantity] [quality] <item-name>

Notes

• Requires Admin privileges.
• Does not assume Factorio 2.0+ quality support; attempts graceful fallbacks.
• Accepts common plural forms for item names (e.g., "iron plates" → iron-plate).
• Suggests items based on humanized names ("iron plate" matches iron-plate) and plural forms.

Examples

/manifest 100 epic iron plates
/manifest iron plate
/manifest 1 batteries