adjust rust workflow, show build/test success badge and test coverage

.github/workflows/rust.yml

@@ -2,25 +2,38 @@ name: Rust
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 env:
   CARGO_TERM_COLOR: always
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
-    - name: Build
-      run: |
+      - uses: actions/checkout@v4
+      - name: Build
+        run: |
           cd rust/main_logic
           cargo build --verbose
-    - name: Run tests
-      run: |
+      - name: Run tests
+        run: |
           cd rust/main_logic
           cargo test --verbose
+      - name: Install tarpaulin
+        run: cargo install cargo-tarpaulin
+      - name: Run tarpaulin
+        run: |
+          cd rust/main_logic
+          cargo tarpaulin --out Xml --output-dir ../../
+      - name: Upload to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: true
+          files: ./cobertura.xml
+          flags: unittests
+          verbose: true

README.md

@@ -1,2 +1,5 @@
+![Rust](https://github.com/Zitronenjoghurt/LastColony/actions/workflows/rust.yml/badge.svg)
+[![codecov](https://codecov.io/gh/Zitronenjoghurt/LastColony/branch/main/graph/badge.svg)](https://codecov.io/gh/Zitronenjoghurt/LastColony)
+
 # LastColony
 Last Colony is my 4th Godot project and was heavily inspired by Final Earth 2. This will be the first time I will use my own pixel art and Threading in Godot.