Model entity-creating display actions: Create In-World Text, HUD Text, Effect, Beam, Icon and ids

Problem

Bastion on the committed docs/scenario-examples/valid/bastion.json now runs 30 ticks (after #116) and stops:

not_modeled — action createInWorldText, tick 30, rule 168 [Event/先知] Attach prophet next-event text, eventPlayer p2, action 1.

Model the entity-creating presentation actions as a class, not one at a time:

Create In-World Text, Create HUD Text, Create Effect, Create Beam Effect, Create Icon, Create Progress Bar In-World Text, Create Progress Bar HUD Text, Create Map Text and any other action in the catalog that creates a display entity.
Each creates an entity with an id. Record the creation in the trace (kind, visible-to, position/header/text as opaque display values from Model display-only value producers (Icon String, Custom Color, ...) as opaque display values #113) so the viewer can list "what is on screen".
Support the readers that depend on the creation: Last Text ID, Last Created Entity, and the Destroy ... / Set ... Text / Update ... counterparts that take that id. A reader that cannot be answered stays not_modeled and names the construct.
No guessed defaults. Anything whose result is not measured is not_modeled; modeled-not-measured choices go in docs/findings.md.

Bastion advances past rule 168 at tick 30; the next stop (or completion) is recorded in the PR body, taken from a real rerun.
Trace shows each created entity with its id and creator.
Tests for creation, id readback, destroy by id, and a stop on an unmodeled reader.
Docs (simulator-interface.md, trace-format.md) updated; size guards respected.