refactor(cook): data-driven recipe generation with in-process flatten and lint

Replace the hardcoded TEMPLATES dict and the ksflatten-relative wrapper
with a single data-driven pipeline:

- recipe_templates.yaml becomes the single source of truth with three
  sections: base (always included), choices (exactly-one per category,
  the invariant pykickstart cannot check) and features (additive flags
  or one-of values)
- generate_recipe.py is a pure YAML consumer: it resolves ingredients,
  renders dishes via pykickstart in-process (no ksflatten binary, no
  %include path munging), lints the invariants pykickstart cannot check
  (exactly-one per choice category, known keys, existing fragments,
  unique filenames) and validates every generated dish
- dish names are derived by a generic rule with canonical category order
  from the templates, independent of YAML key order; no committed
  generated files means no name burn-in
- recipes/ and dishes/ become gitignored build products; the 68 tracked
  generated files (already out of sync with the manifest) are removed
- delete dead ingredients (section-data/, validation/, initial-setup/
  desktop/, live/hypervisor.ks, rpmfusion-nonfree.ks), the stale
  all-ingredients.cfg (replaced by 'make inventory') and the
  bin/generate-recipe and bin/ksflatten-relative wrappers
- Makefile: single 'make all' step plus lint, validate, inventory, test
- add 16 pytest tests covering expansion, selection, naming, lint and
  flatten/validate round-trips

cook/Makefile

@@ -1,52 +1,52 @@
-.PHONY: help generate-recipes validate-recipes clean clean-dishes install-deps flatten-dishes all
+.PHONY: help generate lint validate inventory test install-deps clean clean-recipes clean-dishes all
+
+PYTHON ?= python3
+
+default: all
 
 help:
 	@echo "Phyllome OS Recipe Generator"
 	@echo ""
 	@echo "Available targets:"
-	@echo "  generate-recipes  - Generate all recipes from manifest"
-	@echo "  validate-recipes  - Validate existing recipes"
-	@echo "  all               - Generate, validate, and flatten all recipes (default)"
-	@echo "  flatten-dishes    - Flatten all recipes to dishes"
-	@echo "  clean-dishes      - Remove flattened dishes"
-	@echo "  clean-recipes     - Remove generated recipes"
-	@echo "  clean-all	       - Remove recipes and dishes"
-	@echo "  install-deps      - Install Python dependencies"
+	@echo "  all          - Generate recipes and dishes, lint, and validate (default)"
+	@echo "  generate     - Same as 'all'"
+	@echo "  lint         - Lint manifest and templates without writing files"
+	@echo "  validate     - Validate existing dishes without regenerating"
+	@echo "  inventory    - Print the ingredient inventory derived from recipe_templates.yaml"
+	@echo "  test         - Run the pytest test suite"
+	@echo "  install-deps - Install Python dependencies"
+	@echo "  clean        - Remove generated recipes and dishes"
+	@echo "  clean-recipes- Remove generated recipes only"
+	@echo "  clean-dishes - Remove generated dishes only"
 
-all: generate-recipes flatten-dishes validate-recipes
-	@echo "✓ All recipes generated, flattened, and validated"
+all: generate
+
+generate:
+	@$(PYTHON) generate_recipe.py
+
+lint:
+	@$(PYTHON) generate_recipe.py --no-generate --no-validate
+
+validate:
+	@$(PYTHON) generate_recipe.py --no-generate --no-lint
+
+inventory:
+	@$(PYTHON) generate_recipe.py --inventory
+
+test:
+	@$(PYTHON) -m pytest tests
 
 install-deps:
-	pip install -r requirements.txt
+	@pip install -r requirements.txt
 
-generate-recipes:
-	@rm -f recipes/*.cfg
-	@python3 generate_recipe.py \
-		--manifest recipes_manifest.yaml \
-		--output-dir recipes/
-
-validate-recipes:
-	@echo "Validating recipes..."
-	@for f in dishes/*.cfg; do \
-		if [ -f "$$f" ]; then \
-			echo "  Processing: $$(basename $$f)"; \
-			ksflatten -c "$$f" -o /dev/null 2>&1 && echo "    ✓ OK" || { echo "    ✗ FAILED"; exit 1; }; \
-		fi; \
-	done
-
-flatten-dishes:
-	@echo "Flattening recipes to dishes..."
-	@python bin/ksflatten-relative recipes dishes
-
-clean-dishes:
-	rm -f dishes/*.cfg
-	@echo "✓ Flattened dishes removed. Run 'make flatten-dishes' to regenerate."
+clean:
+	@rm -f recipes/*.cfg dishes/*.cfg
+	@echo "Generated recipes and dishes removed. Run 'make all' to regenerate."
 
 clean-recipes:
-	rm -f recipes/*.cfg
-	@echo "Generated recipes removed. Edit recipes_manifest.yaml and run 'make generate-recipes' to regenerate. Run 'make clean-dishes' to remove flattened dishes."
+	@rm -f recipes/*.cfg
+	@echo "Generated recipes removed. Run 'make generate' to regenerate."
 
-clean-all:
-	rm -f dishes/*.cfg
-	rm -f recipes/*.cfg
-	@echo "✓ Flattened dishes and generated recipes removed. Run 'make all' to regenerate."
+clean-dishes:
+	@rm -f dishes/*.cfg
+	@echo "Generated dishes removed. Run 'make generate' to regenerate."