Lint with ineffassign, add go report badge (#5)

.github/workflows/tests.yml

@@ -55,6 +55,7 @@ jobs:
           sudo apt-get install -y libgl1-mesa-dev xorg-dev
           go get .
           go install honnef.co/go/tools/cmd/staticcheck@latest
+          go install github.com/gordonklaus/ineffassign@latest
       - name: Check format
         run: |
           if gofmt -e -l . >&1 | grep '^'; then
@@ -64,3 +65,5 @@ jobs:
         run: go vet ./...
       - name: Lint with staticcheck
         run: staticcheck ./...
+      - name: Lint with ineffassign
+        run: ineffassign ./...

README.md

@@ -1,6 +1,7 @@
 # Arche Pixel
 
 [![Test status](https://img.shields.io/github/actions/workflow/status/mlange-42/arche-pixel/tests.yml?branch=main&label=Tests&logo=github)](https://github.com/mlange-42/arche-pixel/actions/workflows/tests.yml)
+[![Go Report Card](https://goreportcard.com/badge/github.com/mlange-42/arche-pixel)](https://goreportcard.com/report/github.com/mlange-42/arche-pixel)
 [![Go Reference](https://pkg.go.dev/badge/github.com/mlange-42/arche-pixel.svg)](https://pkg.go.dev/github.com/mlange-42/arche-pixel)
 [![GitHub](https://img.shields.io/badge/github-repo-blue?logo=github)](https://github.com/mlange-42/arche-pixel)
 [![MIT license](https://img.shields.io/github/license/mlange-42/arche-pixel)](https://github.com/mlange-42/arche-pixel/blob/main/LICENSE)