Use canonical command names

Use the canonical names below in new scripts and documentation. Other spellings remain compatibility aliases and use the same runners:

Compatibility spelling	Canonical spelling
`hyp init`	`hyp setup`
`hyp unattach`	`hyp detach`
`hyp client history providers`	`hyp backfill list`
`hyp skills install`	`hyp client skills install`
`hyp policy ...`, `hyp ignore`, `hyp unignore`, `hyp purge`	`hyp privacy ...`
`hyp query status`, `hyp query refresh`, `hyp query maintain`	`hyp cache status`, `hyp cache refresh`, `hyp cache maintain`
`hyp graph neighbors`	`hyp query graph neighbors`
`hyp vector search`	`hyp query vector search`
`hyp plugin new`, `hyp plugin doctor`	`hyp dev plugin new`, `hyp dev plugin doctor`
`hyp mcp`	`hyp mcp serve`
`hyp enrich ...`	`hyp enrichment ...`

hyp attach and hyp detach are the preferred short forms of hyp client attach and hyp client detach; both spellings run the same command.

Plugin-owned aliases are available only when the owning plugin is active.