Add Makefile

Targets: build, install, uninstall, test, check, fmt
Installs to ~/.local/bin by default

Makefile

@@ -0,0 +1,58 @@
+.PHONY: all build release debug install uninstall clean test check help
+
+PREFIX ?= $(HOME)/.local
+BINDIR ?= $(PREFIX)/bin
+
+CARGO ?= cargo
+CARGO_FLAGS ?=
+
+all: release
+
+build: release
+
+release:
+	$(CARGO) build --release $(CARGO_FLAGS)
+
+debug:
+	$(CARGO) build $(CARGO_FLAGS)
+
+install: release
+	install -d $(BINDIR)
+	install -m 755 target/release/ork $(BINDIR)/ork
+
+uninstall:
+	rm -f $(BINDIR)/ork
+
+clean:
+	$(CARGO) clean
+
+test:
+	$(CARGO) test $(CARGO_FLAGS)
+
+check:
+	$(CARGO) check $(CARGO_FLAGS)
+	$(CARGO) clippy $(CARGO_FLAGS) -- -D warnings
+
+fmt:
+	$(CARGO) fmt
+
+fmt-check:
+	$(CARGO) fmt -- --check
+
+help:
+	@echo "orkmode - org-mode parser and CLI"
+	@echo ""
+	@echo "Targets:"
+	@echo "  all, build, release  Build release binary"
+	@echo "  debug                Build debug binary"
+	@echo "  install              Install to $(BINDIR)"
+	@echo "  uninstall            Remove from $(BINDIR)"
+	@echo "  clean                Remove build artifacts"
+	@echo "  test                 Run tests"
+	@echo "  check                Run cargo check and clippy"
+	@echo "  fmt                  Format code"
+	@echo "  fmt-check            Check formatting"
+	@echo ""
+	@echo "Variables:"
+	@echo "  PREFIX               Installation prefix (default: ~/.local)"
+	@echo "  CARGO                Cargo command (default: cargo)"