Add whitepaper: Feedback Is All You Need

Permacomputer whitepaper covering uncommonlisp architecture,
bytecode VM, continuations, portal, EML universality proof,
and benchmarks. AGPL-3.0-only. Builds via make whitepaper
using a local venv (no sudo).

Makefile

@@ -20,7 +20,37 @@ lint:
 	python3 -m py_compile tests.py
 	python3 -m py_compile bench.py
 
+# ═══════════════════════════════════════════════════════════════════
+# Whitepaper
+# ═══════════════════════════════════════════════════════════════════
+
+VENV        := whitepaper/.venv
+RST         := whitepaper/uncommonlisp-whitepaper.rst
+PDF         := whitepaper/uncommonlisp-whitepaper.pdf
+STYLE       := whitepaper/whitepaper.style
+
+$(VENV)/bin/rst2pdf:
+	python3 -m venv $(VENV)
+	$(VENV)/bin/pip install --upgrade pip
+	$(VENV)/bin/pip install rst2pdf
+
+whitepaper: $(PDF)
+
+$(PDF): $(RST) $(STYLE) $(VENV)/bin/rst2pdf
+	cd whitepaper && ../$(<D)/.venv/bin/rst2pdf \
+		-s whitepaper.style \
+		--fit-background-mode=scale \
+		uncommonlisp-whitepaper.rst \
+		-o uncommonlisp-whitepaper.pdf
+	@ln -sf uncommonlisp-whitepaper.pdf whitepaper/WHITEPAPER.pdf
+	@echo "Built: $(PDF)"
+
 clean:
 	rm -rf __pycache__ *.pyc
 
-.PHONY: all test test-verbose bench bench-verbose repl lint clean
+clean-whitepaper:
+	rm -rf $(VENV) $(PDF) whitepaper/WHITEPAPER.pdf
+
+clean-all: clean clean-whitepaper
+
+.PHONY: all test test-verbose bench bench-verbose repl lint whitepaper clean clean-whitepaper clean-all