vendor: move vendored sources in-tree

This should make it easier to see changes instead of just a blob

vendor/github.com/redis/go-redis/v9/Makefile

@@ -0,0 +1,67 @@
+GO_MOD_DIRS := $(shell find . -type f -name 'go.mod' -exec dirname {} \; | sort)
+
+docker.start:
+	docker compose --profile all up -d --quiet-pull
+
+docker.stop:
+	docker compose --profile all down
+
+test:
+	$(MAKE) docker.start
+	@if [ -z "$(REDIS_VERSION)" ]; then \
+		echo "REDIS_VERSION not set, running all tests"; \
+		$(MAKE) test.ci; \
+	else \
+		MAJOR_VERSION=$$(echo "$(REDIS_VERSION)" | cut -d. -f1); \
+		if [ "$$MAJOR_VERSION" -ge 8 ]; then \
+			echo "REDIS_VERSION $(REDIS_VERSION) >= 8, running all tests"; \
+			$(MAKE) test.ci; \
+		else \
+			echo "REDIS_VERSION $(REDIS_VERSION) < 8, skipping vector_sets tests"; \
+			$(MAKE) test.ci.skip-vectorsets; \
+		fi; \
+	fi
+	$(MAKE) docker.stop
+
+test.ci:
+	set -e; for dir in $(GO_MOD_DIRS); do \
+	  echo "go test in $${dir}"; \
+	  (cd "$${dir}" && \
+	    go mod tidy -compat=1.18 && \
+	    go vet && \
+	    go test -v -coverprofile=coverage.txt -covermode=atomic ./... -race -skip Example); \
+	done
+	cd internal/customvet && go build .
+	go vet -vettool ./internal/customvet/customvet
+
+test.ci.skip-vectorsets:
+	set -e; for dir in $(GO_MOD_DIRS); do \
+	  echo "go test in $${dir} (skipping vector sets)"; \
+	  (cd "$${dir}" && \
+	    go mod tidy -compat=1.18 && \
+	    go vet && \
+	    go test -v -coverprofile=coverage.txt -covermode=atomic ./... -race \
+	      -run '^(?!.*(?:VectorSet|vectorset|ExampleClient_vectorset)).*$$' -skip Example); \
+	done
+	cd internal/customvet && go build .
+	go vet -vettool ./internal/customvet/customvet
+
+bench:
+	go test ./... -test.run=NONE -test.bench=. -test.benchmem -skip Example
+
+.PHONY: all test test.ci test.ci.skip-vectorsets bench fmt
+
+build:
+	go build .
+
+fmt:
+	gofumpt -w ./
+	goimports -w  -local github.com/redis/go-redis ./
+
+go_mod_tidy:
+	set -e; for dir in $(GO_MOD_DIRS); do \
+	  echo "go mod tidy in $${dir}"; \
+	  (cd "$${dir}" && \
+	    go get -u ./... && \
+	    go mod tidy -compat=1.18); \
+	done