Remove global glyph state

[kostyafarber]

Summary

This PR removes the editor-global glyph model and moves selection/editor interaction around scene nodes, raw object IDs, and resolved ShiftObject views.

It deletes the old command layer, removes stale/missing glyph assumptions from the font APIs, introduces the renderer-local ShiftStore/Scene/Selection path, and restores core select/pen behavior against the new model.

What changed

• Selection now stores raw editor IDs instead of glyph-specific entry maps.
• Scene nodes are stored through a small flat ShiftStore, with Scene as the semantic wrapper.
• Glyph-internal objects resolve through ShiftObject classes for points, anchors, contours, segments, and nodes.
• Font/FontStore loading now materializes glyph/layer state directly without public stale/missing/loaded glyph projection APIs.
• Select behavior was restored for point/segment selection, marquee, translate, resize, rotate, BendCurve, smooth toggle, segment upgrade, copy, cut, and duplicate.
• Text-run editing is out of scope for this PR; the active select behavior no longer wires TextRunEdit.
• Dead command and unused text/glyph finder files were removed.

Validation

• pnpm test
• pnpm lint:check
• pnpm format:check
• pnpm typecheck
• pnpm deadcode:strict
• git diff --cached --check