feat(registry): initialize X-Frames Blueprint Registry with 4 demo blueprints

- Add security-assessment-v1, it-incident-triage-v1, common-grounds-deploy-v1, org-bootstrap-v1
- Add index.json registry index with full metadata
- Add BLUEPRINT_SCHEMA_v1_0.json validation schema
- Add SCHEMA.md reference docs

Co-Authored-By: Eyean (EOA0000) <eyean@eios.local>

README.md

@@ -1,3 +1,22 @@
-# blueprints
+# X-Frames Blueprint Registry
 
-EIOS Blueprint Package Registry — submit, discover, and install EIOS blueprints
+The official EIOS Blueprint Package Registry. Blueprints are composable, schema-validated
+packages that encode workflows, tools, and deployment templates for the EIOS platform.
+
+## Contents
+- `blueprints/` — blueprint packages (one subdirectory per blueprint)
+- `index.json` — machine-readable registry index
+- `BLUEPRINT_SCHEMA_v1_0.json` — validation schema
+- `SCHEMA.md` — schema documentation
+
+## Available Blueprints
+
+| Blueprint | Type | License |
+|-----------|------|---------|
+| Security Assessment Report Generator | bridge_workflow | commercial |
+| IT Incident Triage Workflow | bridge_workflow | commercial |
+| Common Grounds Deployment Package | deployment_template | internal |
+| Organization Bootstrap Kit | eios_tool | internal |
+
+## Submission
+Blueprints are submitted via `eac-blueprint submit` CLI or the Blueprint API at port 32740.