infra: Created workflow for github actions

.github/workflows/workflow.yaml

@@ -0,0 +1,24 @@
+name: Continuous Integration
+
+on: [pull_request, push]
+
+jobs:
+    continuous-integration:
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v3
+
+            - name: Using Dotnet 8
+              uses: actions/setup-dotnet@v4
+              with:
+                dotnet-version: '8.0.x'
+
+            - name: Restore dependencies
+              run: dotnet restore
+
+            - name: Test
+              run: dotnet test
+
+            - name: Build release
+              run: dotnet build -c Release

README.md

@@ -2,7 +2,7 @@
 
 A lightweight, dependency-free, and deterministic simple fixed-point number implementation in C#, which is ideal for physics simulations, multiplayer lockstep games, and other scenarios where floating-point inconsistencies across platforms must be avoided.
 
-![Static Badge](https://img.shields.io/badge/build-passing-brightgreen)
+![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/RogerKenichi/FixedPointLib/workflow.yaml)
 ![.NET](https://img.shields.io/badge/.NET-8.0-blue)
 ![GitHub License](https://img.shields.io/github/license/RogerKenichi/FixedPointLib)
 ![Last Commit](https://img.shields.io/github/last-commit/RogerKenichi/FixedPointLib)