chore: Move to docs directory

docs/Makefile

@@ -0,0 +1,22 @@
+.PHONY: docs
+
+default: install
+
+
+h help:
+	@egrep '(^\S)|(^$$)|\s+@echo' Makefile
+
+
+install:
+	pip install --upgrade pip
+	pip install -r requirements.txt
+
+
+s serve:
+	mkdocs serve --strict
+
+b build:
+	mkdocs build --strict
+
+d deploy:
+	mkdocs gh-deploy --strict --force