Edited Makefile to use poetry

docs/Makefile

@@ -5,13 +5,13 @@
 VERSION       = 0.1.2
 PRODUCT       = neo4j-genai-python
 SPHINXOPTS    =
-SPHINXBUILD   = sphinx-build
+SPHINXBUILD   = poetry run sphinx-build
 PAPER         =
 BUILDDIR      = build
 
-# User-friendly check for sphinx-build
-ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
-$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from https://www.sphinx-doc.org/)
+# User-friendly check for sphinx-build via Poetry
+ifeq ($(shell poetry run which sphinx-build >/dev/null 2>&1; echo $$?), 1)
+$(error The 'sphinx-build' command was not found within the Poetry environment. Make sure Sphinx is installed in your project dependencies.)
 endif
 
 # Internal variables.