Added Makefile and tests for the main radarr_handler

Makefile

@@ -0,0 +1,33 @@
+default: run
+
+test:
+	@cargo test
+
+ ## Run all tests with coverage - `cargo install cargo-tarpaulin`
+test-cov:
+	@cargo tarpaulin
+
+build:
+	@make test && cargo build --release
+
+run:
+	@CARGO_INCREMENTAL=1 cargo fmt && make lint && cargo run
+
+lint:
+	@find . | grep '\.\/src\/.*\.rs$$' | xargs touch && cargo clippy --all-targets --workspace
+
+lint-fix:
+	@cargo fix
+
+fmt:
+	@cargo fmt
+
+## Analyse for unsafe usage - `cargo install cargo-geiger`
+analyse:
+	@cargo geiger
+
+release:
+	@git tag -a ${V} -m "Release ${V}" && git push origin ${V}
+
+delete-tag:
+	@git tag -d ${V} && git push --delete origin ${V}