Enforce Genarrative play-type SOP and update docs

Rewrite Genarrative play-type integration guidance across .codex and .hermes to define a platform-level SOP: default to form/image workbench, unify single-image asset slots (CreativeImageInputPanel), standardize series-material sheet->cut->transparent->OSS pipeline, and forbid copying legacy chat/agent workflows as the default. Add decision-log entry freezing the SOP and a pitfalls note warning against direct reuse of old play tools. Update CONTEXT.md and docs/README.md, add a new PRD file, and apply related small server-side changes (module-auth, spacetime-client mappers and runtime) to align back-end code with the new contracts and flows.

packages/shared/src/contracts/index.ts

@@ -1,6 +1,7 @@
 export type * from './creativeAgent';
 export type * from './creationAudio';
 export type * from './hyper3d';
+export type * from './jumpHop';
 export type * from './puzzleCreativeTemplate';
 export type * from './visualNovel';
 export type * from './barkBattle';