feat(v0.2.0): draw_entities tag-driven entity-render

Phase A.2: draw_entities(filter) iterates composition.list_by_tag and
renders each entity per its sprite-properties. Three paths:

1. sprite_atlas + sprite_uv.{x,y,w,h} → atlas sub-rect via
   engine.render.draw_sprite_transform (with texture-handle cache)
2. sprite_color + sprite_w + sprite_h → engine.render.draw_rect
3. magenta 16x16 fallback rect for entities without sprite-properties

position.x/position.y is treated as visual-CENTER for all paths.

Filter shape: {tag = "..."} — anything else is loud-error
(template-id / property-predicate filters deferred per A-Q3).

New dep: lib-core.composition v0.1.0.
draw_map (v0.1) unverändert.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

manifest.lib

@@ -1 +1 @@
-{"id":"lib-core.render","version":"0.1.0","api_min":"0.1","deps":[{"id":"lib-core.maps","version":"0.5.7"}]}
+{"id":"lib-core.render","version":"0.2.0","api_min":"0.1","deps":[{"id":"lib-core.maps","version":"0.5.7"},{"id":"lib-core.composition","version":"0.1.0"}]}