[Feature] Add order randomizer

[yeleepark]

Summary

Add an Order Randomizer for shuffling a list into a random presentation, review, speaking, or task order.

Why

Random ordering is useful for meetings, presentations, code reviews, classroom activities, workshops, giveaways, and team rituals. It is simple, broadly useful, and fits oddkit's lightweight local utility direction.

Proposed scope

• Paste or type a list of names or items
• Randomize the order
• Re-randomize without re-entering items
• Optionally pin or exclude items in a later version
• Copy the randomized order to the clipboard
• Process everything locally in the browser

UX notes

• Keep the original list and randomized result easy to compare
• Number the randomized output clearly
• Use a direct action label such as Shuffle order
• Suggested microcopy: // no one volunteered, so here we are

Acceptance criteria

• A pasted list can be shuffled into a numbered order
• Empty lines and extra whitespace are handled gracefully
• Re-shuffling produces a new order when possible
• Results can be copied to the clipboard
• No input data is uploaded to a server