Add getting started examples

README.md

@@ -1,2 +1,27 @@
 # BasicRepos
 A project to build .NET repository services more quickly
+
+## Getting Started
+
+To add Basic Repositories to your service collection simply use `AddBasicRepos<TDbContext>()` on the Service Collection. For example:
+
+```csharp
+builder.Services.AddBasicRepos<MyDbContext>();
+```
+
+This will add a repository registration for every `DbSet<T>` on the target `DbContext`. 
+
+> To add support for `DbSet<T>`s in another `DbContext`, simply call `AddBasicRepos<TDbContext>()` again with the second type.
+>
+> For example:
+>
+> ```csharp
+> builder.Services.AddBasicRepos<MyDbContext>()
+>                 .AddBasicRepos<MyOtherDbContext>();
+> ```
+
+Using `AddBasicRepos<MyDbContext>()` will register each of the following repository types for each `DbSet<T>`:
+
+- `IRepository<T>`: repository with read and write abilities on the underlying data store, with no cache
+- `IReadOnlyRepository<T>`: repository with only the ability to read from the underlying data store
+- `ICachedRepository<T>`: repository which wraps an in-memory cache of the items it manages