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/crates/module-jump-hop/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "module-jump-hop"
+edition.workspace = true
+version.workspace = true
+license.workspace = true
+
+[features]
+default = []
+spacetime-types = ["dep:spacetimedb"]
+
+[dependencies]
+serde = { workspace = true }
+shared-kernel = { workspace = true }
+spacetimedb = { workspace = true, optional = true }