* Navigation: opt-in free orbit and shared Normal to Selection
Preserve the complete reviewed feature, shared camera setting propagation,
rigid pivot behavior and focus/drag regressions from PR #1912.
Consolidate the prior main-integration commits before rebasing, so their
merge-resolution fixes remain in the linear feature history.
* docs: move free orbit help beside viewport controls
* Merge main into fix/solidworks-free-orbit
Camera animation is gone on main, and with it the orbit snap spring: the Shift
snap keeps its unsnapped orbit in orbit_free, which the free-orbit checks now read.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Co-authored-by: bherbruck <brennen.herbruck@gmail.com>
Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
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