feat: add CI/CD workflows, release automation, and CLI version flag

Adds Gitea Actions for continuous integration and tagged releases, including static musl binary compilation and artifact upload. Introduces a Makefile target to automate semantic version bumping and publishing. Bumps the package version to 0.1.1 and enables automatic `--version` output via Clap.

Makefile

@@ -63,3 +63,28 @@ clean-doc:
 .PHONY: clean
 clean: clean-doc
 	rm -rf $(VENV)
+
+# ── release ───────────────────────────────────────────────────────────────────
+
+CARGO_TOML := $(CARGO_DIR)/obikmer/Cargo.toml
+
+.PHONY: bump-version
+bump-version:
+	@current=$$(grep '^version = ' $(CARGO_TOML) | head -n 1 | sed 's/version = "\(.*\)"/\1/'); \
+	if [ -n "$(RELEASE)" ]; then \
+		new_version="$(RELEASE)"; \
+	else \
+		major=$$(echo $$current | cut -d. -f1); \
+		minor=$$(echo $$current | cut -d. -f2); \
+		patch=$$(echo $$current | cut -d. -f3); \
+		new_patch=$$((patch + 1)); \
+		new_version="$$major.$$minor.$$new_patch"; \
+	fi; \
+	echo "Version: $$current -> $$new_version"; \
+	sed -i.bak "s/^version = \"$$current\"/version = \"$$new_version\"/" $(CARGO_TOML) && \
+	rm $(CARGO_TOML).bak
+
+.PHONY: release
+release: bump-version
+	@jj auto-describe
+	@jj git push --change @