Updated docs build process to make docs

Makefile

@@ -1,6 +1,17 @@
-.PHONY: all
+.PHONY: all docs install
 
-all: install
+all: install docs
+
+docs: SHELL:=/bin/bash
+docs:
+	if [ ! -d "docs/.venv" ]; then python3 -m venv "docs/.venv"; fi
+	( \
+		source docs/.venv/bin/activate;\
+		pip install -r docs/requirements.txt; \
+		doxygen docs/Doxyfile; \
+		sphinx-build -b html docs/source docs/build/html; \
+		deactivate \
+	)
 
 install:
 	install -d $(DEST_DIR)/

build_docs

@@ -1,2 +0,0 @@
-doxygen docs/Doxyfile
-sphinx-build -b html docs/source docs/build/html

docs/Doxyfile

@@ -778,7 +778,7 @@ WARNINGS               = YES
 # will automatically be disabled.
 # The default value is: YES.
 
-WARN_IF_UNDOCUMENTED   = YES
+WARN_IF_UNDOCUMENTED   = NO
 
 # If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate warnings for
 # potential errors in the documentation, such as not documenting some parameters