Migrated build script to C# (#401)

app/SharedTools/FNVHash.cs

@@ -0,0 +1,62 @@
+// ReSharper disable MemberCanBePrivate.Global
+namespace SharedTools;
+
+/// <summary>
+/// Implements the Fowler–Noll–Vo hash function for 32-bit and 64-bit hashes.
+/// </summary>
+public static class FNVHash
+{
+    private const uint FNV_OFFSET_BASIS_32_BIT = 2_166_136_261;
+    private const ulong FNV_OFFSET_BASIS_64_BIT = 14_695_981_039_346_656_037;
+    
+    private const uint FNV_PRIME_32_BIT = 16_777_619;
+    private const ulong FNV_PRIME_64_BIT = 1_099_511_628_211;
+
+    /// <summary>
+    /// Computes the 32bit FNV-1a hash of a string.
+    /// </summary>
+    /// <param name="text">The string to hash.</param>
+    /// <returns>The 32bit FNV-1a hash of the string.</returns>
+    public static uint ToFNV32(this string text) => ToFNV32(text.AsSpan());
+
+    /// <summary>
+    /// Computes the 32bit FNV-1a hash of a string.
+    /// </summary>
+    /// <param name="text">The string to hash.</param>
+    /// <returns>The 32bit FNV-1a hash of the string.</returns>
+    public static uint ToFNV32(this ReadOnlySpan<char> text)
+    {
+        var hash = FNV_OFFSET_BASIS_32_BIT;
+        foreach (var c in text)
+        {
+            hash ^= c;
+            hash *= FNV_PRIME_32_BIT;
+        }
+
+        return hash;
+    }
+    
+    /// <summary>
+    /// Computes the 64bit FNV-1a hash of a string.
+    /// </summary>
+    /// <param name="text">The string to hash.</param>
+    /// <returns>The 64bit FNV-1a hash of the string.</returns>
+    public static ulong ToFNV64(this string text) => ToFNV64(text.AsSpan());
+    
+    /// <summary>
+    /// Computes the 64bit FNV-1a hash of a string.
+    /// </summary>
+    /// <param name="text">The string to hash.</param>
+    /// <returns>The 64bit FNV-1a hash of the string.</returns>
+    public static ulong ToFNV64(this ReadOnlySpan<char> text)
+    {
+        var hash = FNV_OFFSET_BASIS_64_BIT;
+        foreach (var c in text)
+        {
+            hash ^= c;
+            hash *= FNV_PRIME_64_BIT;
+        }
+
+        return hash;
+    }
+}

app/SharedTools/SharedTools.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <LangVersion>latest</LangVersion>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>