Add cqw/cqh/cqi/cqb/cqmin/cqmax to the unit tables and generated
helpers, then thread them through the shared length resolution path.
Length::ResolutionContext now carries the subject element and whether
its inline axis is horizontal. Container units need that extra context:
the nearest eligible query container is selected from the subject
element's flat-tree ancestors, and cqi/cqb/cqmin/cqmax map logical axes
through the subject's writing mode before resolving to a physical width
or height.
Teach Length to resolve each axis against the selected container's
content box, fall back to viewport lengths when no eligible container
exists, and mark size-container dependencies so post-layout
recomputation can happen when layout is not up to date.
Also expose the new units through Typed OM, reject them for
computationally independent `@property` initial values, and add focused
font-size coverage.
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