Add cache clean to conan-clean

Makefile

@@ -215,6 +215,7 @@ conan-create: ## Create Conan package
 conan-clean: ## Clean Conan cache and build folders
 	@echo ">>> Cleaning Conan cache and build folders..."
 	@conan remove "*" --confirm
+	@conan cache clean
 	@if test -d "$(f_release)" ; then rm -rf "$(f_release)"; fi
 	@if test -d "$(f_debug)" ; then rm -rf "$(f_debug)"; fi
 	@echo ">>> Done"
@@ -249,4 +250,4 @@ help: ## Show help message
 		printf "%-20s %s" $$help_command ; \
 		printf '\033[0m'; \
 		printf "%s\n" $$help_info; \
-	done
+	done