feat: bootstrap design kit and vaporwave demo baseline

kit/docs/bible-skeleton/governance/documentation-policy.md

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+# Documentation Policy
+
+## Purpose
+
+This policy defines how architectural knowledge is captured and maintained.
+
+## Mandatory Rules
+
+- Record every architecture decision in the Bible before or together with implementation.
+- Use English for all architecture documentation.
+- Keep only current architecture in active sections.
+- When a solution is replaced, update or remove obsolete guidance in the same change.
+- Keep architecture details centralized in `bible/`; other top-level docs should only reference it.
+
+## Change Workflow
+
+1. Update the relevant file(s) in `bible/architecture/`.
+2. If behavior changed, add or update a decision note in `bible/decisions/`.
+3. Remove duplicated or outdated statements from non-Bible docs.
+4. Validate consistency against current code paths.
+