docs: merge low-traffic pages + consolidate hyperstaking

[HDauven]

This PR reduces page count and improves discoverability by merging several low-traffic docs into focused single pages.

Changes

• Learn: merge Assets & Regulations deep-dive pages into one page (/learn/deep-dive/assets-and-regulations), archive old pages, add redirects, simplify sidebar.
• Learn: merge Wallet Terminology into Glossary, archive old page, add redirect.
• Developer: merge Address Format + Hashing Algorithms into a single reference page (/developer/integrations/reference), archive old pages, add redirects, update sidebar.
• Learn: merge Hyperstaking overview + technical guide into one page (/learn/hyperstaking), archive the old technical page, add redirect.

Validation

• npm run build

The base branch was changed.