Makefile: add fmt-check, hooks targets; update check prereqs

- Add fmt-check target for gofmt format verification without modifying files
- Add hooks target to install pre-commit git hook
- Update check target to include fmt-check (check: fmt-check lint test)
- Remove redundant gofmt check from lint target (now in fmt-check)
- Add .PHONY declarations for all phony targets
- Update tools target to use go install

Makefile

@@ -11,22 +11,30 @@ default: clean debug
 commit: fmt lint
 	git commit -a
 
-# get golangci-lint with:
-# go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.31.0
-# get gofumports with:
-# go get mvdan.cc/gofumpt/gofumports
+# get gofumpt with:
+# go install mvdan.cc/gofumpt@latest
 fmt:
 	gofumpt -l -w .
 	golangci-lint run --fix
 
+fmt-check:
+	@test -z "$$(gofmt -l .)" || { echo "gofmt found unformatted files:"; gofmt -l .; exit 1; }
+
 lint:
 	golangci-lint run
-	sh -c 'test -z "$$(gofmt -l .)"'
 
 test:
 	go test ./...
 
-check: lint test
+check: fmt-check lint test
+
+build: ./$(FN)d
+
+hooks:
+	@mkdir -p .git/hooks
+	@printf '#!/bin/sh\nmake fmt-check lint\n' > .git/hooks/pre-commit
+	@chmod +x .git/hooks/pre-commit
+	@echo "Pre-commit hook installed."
 
 debug: ./$(FN)d
 	DEBUG=1 GOTRACEBACK=all ./$(FN)d
@@ -48,5 +56,6 @@ docker:
 		go build -o ../../$(FN)d $(GOFLAGS) .
 
 tools:
-	go get -v github.com/golangci/golangci-lint/cmd/golangci-lint@v1.31.0
-	go get -v mvdan.cc/gofumpt/gofumports
+	go install mvdan.cc/gofumpt@latest
+
+.PHONY: default commit fmt fmt-check lint test check build hooks debug debugger run clean docker tools