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.

server-rs/Cargo.lock

@@ -1827,6 +1827,15 @@ dependencies = [
  "spacetimedb",
 ]
 
+[[package]]
+name = "module-jump-hop"
+version = "0.1.0"
+dependencies = [
+ "serde",
+ "shared-kernel",
+ "spacetimedb",
+]
+
 [[package]]
 name = "module-match3d"
 version = "0.1.0"
@@ -3259,6 +3268,7 @@ dependencies = [
  "module-combat",
  "module-custom-world",
  "module-inventory",
+ "module-jump-hop",
  "module-match3d",
  "module-npc",
  "module-puzzle",
@@ -3291,6 +3301,7 @@ dependencies = [
  "module-combat",
  "module-custom-world",
  "module-inventory",
+ "module-jump-hop",
  "module-match3d",
  "module-npc",
  "module-progression",