Add Makefile (#2937)

Makefile

@@ -0,0 +1,71 @@
+.PHONY: all
+all: build
+
+.PHONY: build
+build:
+	go build
+
+.PHONY: install
+install:
+	go install
+
+.PHONY: run
+run:
+	go run main.go
+
+# Run `make run-debug` in one terminal tab and `make print-log` in another to view the program and its log output side by side
+.PHONY: run-debug
+run-debug:
+	go run main.go -debug
+
+.PHONY: print-log
+print-log:
+	go run main.go --logs
+
+.PHONY: unit-test
+unit-test:
+	go test ./... -short
+
+.PHONY: test
+test: unit-test integration-test-all
+
+.PHONY: generate
+generate:
+	go generate ./...
+
+.PHONY: format
+format:
+	gofumpt -l -w .
+
+.PHONY: update-cheatsheet
+update-cheatsheet:
+	go run scripts/cheatsheet/main.go generate
+
+# For more details about integration test, see https://github.com/jesseduffield/lazygit/blob/master/pkg/integration/README.md.
+.PHONY: integration-test-tui
+integration-test-tui:
+	go run cmd/integration_test/main.go tui
+
+.PHONY: integration-test-cli
+integration-test-cli:
+	go run cmd/integration_test/main.go cli $(filter-out $@,$(MAKECMDGOALS))
+
+.PHONY: integration-test-all
+integration-test-all:
+	go test pkg/integration/clients/*.go
+
+.PHONY: bump-gocui
+bump-gocui:
+	scripts/bump_gocui.sh
+
+.PHONY: bump-lazycore
+bump-lazycore:
+	scripts/bump_lazycore.sh
+
+.PHONY: record-demo
+record-demo:
+	demo/record_demo.sh $(filter-out $@,$(MAKECMDGOALS))
+
+.PHONY: vendor
+vendor:
+	go mod vendor && go mod tidy