ci: introduce Makefile

Add CI checks into ci/Makefile and update gh actions.
Motivation is, that makefile can also be added as pre-commit hook for
local development:
> echo 'make -C ci' > .git/hooks/pre-commit; chmod +x .git/hooks/pre-commit

1 files changed, 19 insertions, 0 deletions

diff --git a/ci/Makefile b/ci/Makefile
new file mode 100644
index 0000000..69d6c97
--- /dev/null
+++ b/ci/Makefile
@@ -0,0 +1,19 @@
+all: build build-examples check-fmt check-clippy check-tests check-examples
+
+build:
+	cargo build
+
+build-examples:
+	cargo build --examples
+
+check-fmt:
+	cargo fmt --check
+
+check-clippy:
+	cargo clippy -- -Dwarnings -Aclippy::new_without_default
+
+check-tests:
+	cargo test
+
+check-examples:
+	cargo test --examples