v1.0.0

What's changed

• Set nuget.org username for Trusted Publishing
• Add RekeyOptions: configurable languages and priority; release workflow
• Multi-target net8.0+net10.0, README tweaks
• Replace package icon with the final keycap design (g→п)
• Add package icon and rewrite README as a proper landing page
• Prepare for publishing: untrack internal docs, package metadata
• Replace CC BY-NC-SA Ukrainian data with clean-licensed regenerated dictionaries
• Rename namespace Rekey -> RekeyNet to avoid type/namespace collision
• Add AGENTS.md with agent-oriented usage docs
• Add minimal README for GitHub
• Refactor public API to be simpler and more user-friendly
• Initial commit: Rekey keyboard layout detection & correction library