Establish Soul Frame research repository and workplans

Scaffold the research layout from the research program, add INTENT/SCOPE,
research instruments, concept stubs, and SOUL-WP-0001–0008 phase workplans.
Register the repo with State Hub under domain agents for hub-synced execution.

research/cognitive-science/README.md

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+# Cognitive Science
+
+**Workstream:** WS3 (see `ResearchProgram.md`)  
+**Objective:** Ground Mind as adaptive model-building and control.
+
+## Status
+
+Not started.
+
+## Key questions
+
+*(Pull from ResearchProgram.md and refine as work proceeds.)*
+
+## Sources
+
+Link entries from `sources/bibliography.md` and notes under
+`sources/source-notes/`.
+
+## Notes
+
+Working notes and interim syntheses for this research area live in this directory.