feat(release): add packaging support for Arch, Debian, and RPM

* Implement Arch package build process in release workflow
* Add Debian and RPM packaging specifications
* Include man page installation in Makefile
* Create unitdore man page for documentation

Makefile

@@ -12,16 +12,18 @@ all: build
 build:
 	go build $(LDFLAGS) -o $(BINARY) .
 
-## install: install binary and create config dir
+## install: install binary, man page, and create config dir
 install: build
 	install -Dm755 $(BINARY) $(INSTALL_DIR)/$(BINARY)
+	install -Dm644 docs/unitdore.1 /usr/share/man/man1/unitdore.1
 	mkdir -p $(CONFIG_DIR)
 	@echo "Installed to $(INSTALL_DIR)/$(BINARY)"
 	@echo "Config dir: $(CONFIG_DIR)"
 
-## uninstall: remove binary
+## uninstall: remove binary and man page
 uninstall:
 	rm -f $(INSTALL_DIR)/$(BINARY)
+	rm -f /usr/share/man/man1/unitdore.1
 	@echo "Removed $(INSTALL_DIR)/$(BINARY)"
 
 ## test: run all unit tests