Add project files.

JSMR.Application/Common/Caching/ICache.cs

@@ -0,0 +1,7 @@
+namespace JSMR.Application.Common.Caching;
+
+public interface ICache
+{
+    ValueTask<T?> GetAsync<T>(string key, CancellationToken cancellationToken = default);
+    ValueTask SetAsync<T>(string key, T value, CacheEntryOptions options, CancellationToken cancellationToken = default);
+}