Move Wasmtime for .NET to the Wasmtime repo.

This moves the Wasmtime for .NET implementation to the Wasmtime repo.

Wasmtime for .NET is a binding of the Wasmtime API for use in .NET.

crates/misc/dotnet/src/Store.cs

@@ -0,0 +1,75 @@
+using System;
+using System.IO;
+
+namespace Wasmtime
+{
+    /// <summary>
+    /// Represents the Wasmtime store.
+    /// </summary>
+    public sealed class Store : IDisposable
+    {
+        internal Store(Engine engine)
+        {
+            Handle = Interop.wasm_store_new(engine.Handle);
+
+            if (Handle.IsInvalid)
+            {
+                throw new WasmtimeException("Failed to create Wasmtime store.");
+            }
+        }
+
+        /// <summary>
+        /// Create a <see cref="Module"/> given the module name and bytes.
+        /// </summary>
+        /// <param name="name">The name of the module.</param>
+        /// <param name="bytes">The bytes of the module.</param>
+        /// <returns>Retuw <see cref="Module"/>.</returns>
+        public Module CreateModule(string name, byte[] bytes)
+        {
+            if (string.IsNullOrEmpty(name))
+            {
+                throw new ArgumentNullException(nameof(name));
+            }
+
+            if (bytes is null)
+            {
+                throw new ArgumentNullException(nameof(bytes));
+            }
+
+            return new Module(this, name, bytes);
+        }
+
+        /// <summary>
+        /// Create a <see cref="Module"/> given the module name and path to the WebAssembly file.
+        /// </summary>
+        /// <param name="name">The name of the module.</param>
+        /// <param name="path">The path to the WebAssembly file.</param>
+        /// <returns>Returns a new <see cref="Module"/>.</returns>
+        public Module CreateModule(string name, string path)
+        {
+            return CreateModule(name, File.ReadAllBytes(path));
+        }
+
+        /// <summary>
+        /// Create a <see cref="Module"/> given the path to the WebAssembly file.
+        /// </summary>
+        /// <param name="path">The path to the WebAssembly file.</param>
+        /// <returns>Returns a new <see cref="Module"/>.</returns>
+        public Module CreateModule(string path)
+        {
+            return CreateModule(Path.GetFileNameWithoutExtension(path), path);
+        }
+
+        /// <inheritdoc/>
+        public void Dispose()
+        {
+            if (!Handle.IsInvalid)
+            {
+                Handle.Dispose();
+                Handle.SetHandleAsInvalid();
+            }
+        }
+
+        internal Interop.StoreHandle Handle { get; private set; }
+    }
+}