Add wippy/wc-content-kit module — auto-registered mermaid / markdown / chartjs web components

src/wc-content-kit/.gitignore

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+frontend/*/node_modules/
+frontend/*/dist/
+frontend/*/*.tsbuildinfo
+*.log
+.DS_Store

src/wc-content-kit/Makefile

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+# wc-content-kit — build orchestration
+#
+# Builds three Vue/web-component bundles (mermaid, markdown, chartjs) and
+# stages their dist output under public/wc/{name}/ so the http.static entry
+# (declared in _index.yaml) can serve them.
+#
+# Usage:
+#   make build         build all three components
+#   make clean         remove node_modules and built bundles
+#   make clean-build   clean + build
+#
+# Per-component shortcuts:
+#   make build-mermaid
+#   make build-markdown
+#   make build-chartjs
+
+PUBLIC_DIR = public
+
+.PHONY: help build clean clean-build \
+        build-mermaid build-markdown build-chartjs \
+        install install-mermaid install-markdown install-chartjs
+
+help:
+	@echo "wc-content-kit Makefile"
+	@echo ""
+	@echo "  make build         Build all components (mermaid, markdown, chartjs)"
+	@echo "  make clean         Remove node_modules and built bundles"
+	@echo "  make clean-build   Clean and rebuild from scratch"
+	@echo ""
+	@echo "  make build-mermaid    Build mermaid only"
+	@echo "  make build-markdown   Build markdown only"
+	@echo "  make build-chartjs    Build chartjs only"
+
+# ── Install dependencies ──
+
+install: install-mermaid install-markdown install-chartjs
+
+install-mermaid:
+	cd frontend/mermaid && npm install
+
+install-markdown:
+	cd frontend/markdown && npm install
+
+install-chartjs:
+	cd frontend/chartjs && npm install
+
+# ── Build ──
+
+build: build-mermaid build-markdown build-chartjs
+
+build-mermaid: install-mermaid
+	@rm -rf $(PUBLIC_DIR)/mermaid
+	cd frontend/mermaid && npm run build
+	@cp -r frontend/mermaid/dist $(PUBLIC_DIR)/mermaid
+
+build-markdown: install-markdown
+	@rm -rf $(PUBLIC_DIR)/markdown
+	cd frontend/markdown && npm run build
+	@cp -r frontend/markdown/dist $(PUBLIC_DIR)/markdown
+
+build-chartjs: install-chartjs
+	@rm -rf $(PUBLIC_DIR)/chartjs
+	cd frontend/chartjs && npm run build
+	@cp -r frontend/chartjs/dist $(PUBLIC_DIR)/chartjs
+
+# ── Clean ──
+
+clean:
+	rm -rf frontend/mermaid/node_modules frontend/mermaid/dist
+	rm -rf frontend/markdown/node_modules frontend/markdown/dist
+	rm -rf frontend/chartjs/node_modules frontend/chartjs/dist
+	rm -rf $(PUBLIC_DIR)
+
+clean-build: clean build