implement level1 and level2

Common/Common.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="LevelInputProvider" Version="*" />
+    <PackageReference Include="TextParser" Version="*" />
+  </ItemGroup>
+
+</Project>

Common/LevelSolverBase.cs

@@ -0,0 +1,37 @@
+namespace AoC24.Common;
+
+using AoCLevelInputProvider;
+using Parsing;
+using Parsing.Schema;
+using Parsing.Tokenization;
+
+public abstract class LevelSolverBase
+{
+    public abstract int LevelNumber { get; }
+    private int Year = 2024;
+    private LevelInputProvider inputProvider = new LevelInputProvider();
+
+    protected string GetLevelInput()
+    {
+        return inputProvider.WithYear(this.Year).WithLevel(this.LevelNumber).Provide();
+    }
+
+    public abstract string SolveFirstStar();
+
+    public abstract string SolveSecondStar();
+
+    protected abstract InputSchemaBuilder DefineInputSchema(InputSchemaBuilder schemaBuilder);
+
+    public TokenConverter GetData()
+    {
+        var schemaBuilder = new InputSchemaBuilder();
+        var schema = this.DefineInputSchema(schemaBuilder).Build();
+
+        var parser = new TextParser(schema);
+        var data = parser
+                        .SetInputText(this.GetLevelInput())
+                        .Parse();
+
+        return data;
+    }
+}