feat: add IETF landscape paper source (LaTeX + BibTeX + Makefile)

New LaTeX paper analyzing the AI-agent standardization landscape across
IETF Internet-Drafts. Includes bibliography, updated Makefile for
pdflatex+bibtex build, and gitignore entries for build artifacts.

paper/Makefile

@@ -1,16 +1,26 @@
-# Paper build targets
+TEX      = pdflatex
+BIB      = bibtex
+MAIN     = ietf-landscape
+SOURCES  = $(MAIN).tex ietf-refs.bib
 
-.PHONY: all figures pdf clean
+.PHONY: all clean watch
 
-all: figures pdf
+all: $(MAIN).pdf
 
-figures:
-	python3 export_figures.py
-
-pdf: figures
-	pdflatex -interaction=nonstopmode main.tex
-	pdflatex -interaction=nonstopmode main.tex  # second pass for references
+$(MAIN).pdf: $(SOURCES)
+	$(TEX) $(MAIN)
+	$(BIB) $(MAIN)
+	$(TEX) $(MAIN)
+	$(TEX) $(MAIN)
 
 clean:
-	rm -f main.aux main.log main.out main.bbl main.blg main.pdf
-	rm -rf figures/
+	rm -f $(MAIN).aux $(MAIN).bbl $(MAIN).blg $(MAIN).log \
+	      $(MAIN).out $(MAIN).pdf $(MAIN).toc $(MAIN).fls \
+	      $(MAIN).fdb_latexmk $(MAIN).synctex.gz
+
+watch:
+	@echo "Rebuilding on change..."
+	@while true; do \
+		inotifywait -q -e modify $(SOURCES) 2>/dev/null || sleep 2; \
+		$(MAKE) all; \
+	done