Add check for code formatting

Author: davidsteiner

.github/workflows/ci.yml

@@ -1,6 +1,8 @@
 name: CI
 
 on:
+  push:
+    branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
 
@@ -13,8 +15,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Build
-        run: cargo build --verbose
+      - name: Check formatting
+        run: cargo fmt --check
       - name: Run clippy
         run: cargo clippy --all-targets --all-features -- -Dclippy::all -D warnings
       - name: Run tests

README.md

@@ -4,7 +4,7 @@
 
 **An experimental FIX engine written in Rust.**
 
-[![CI](https://github.com/Validus-Risk-Management/hotfix/actions/workflows/test.yml/badge.svg)](https://github.com/Validus-Risk-Management/hotfix/actions/workflows/test.yml)
+[![CI](https://github.com/Validus-Risk-Management/hotfix/actions/workflows/ci.yml/badge.svg)](https://github.com/Validus-Risk-Management/hotfix/actions/workflows/ci.yml)
 [![codecov](https://codecov.io/gh/Validus-Risk-Management/hotfix/graph/badge.svg?token=OE58PBL0N6)](https://codecov.io/gh/Validus-Risk-Management/hotfix)
 [![crates-badge]](https://crates.io/crates/hotfix)
 [![docs-badge]](https://docs.rs/hotfix)