Document Unraid as planned and not yet available

[ggfevans]

Parent

#25

What to build

Add an Unraid deployment status entry that is visible from Deploy but clearly marked as planned and not yet available.

This should set expectations honestly for Unraid users without presenting a usable install path. It should direct users to available deployment options until Unraid support exists.

Acceptance criteria

• Unraid appears in the Deploy area as planned or not yet available.
• The page or section does not imply there is a working Unraid install path today.
• Users are pointed to Docker, LXC, Proxmox Community Scripts, or TrueNAS Marketplace as available alternatives.
• The wording is concise and avoids sounding like a dead-end error page.
• Canadian/British spelling is used where applicable.
• npm run build passes.

Blocked by

• Refit sidebar IA and navigation labels #26