feat: Allow recursive type definition

Let's say we have the following type:

```typescript
type Chapter = {
  title: string
  next: Chapter | null
}
```

Here, `Chapter` type is recursive, referencing itself.
Typelizer can generate this kind of type, but currently it tries
to import itself and causes an error.
This commit fixes this issue by ignoring itself from import target.
Note that I added spec for Alba only since that was my case,
but please tell me if I should add more specs for other serializers.

lib/typelizer/interface.rb

@@ -66,7 +66,7 @@ def imports
         .uniq
         .reject { |type| global_type?(type) }
 
-      (custom_type_imports + serializer_types).uniq
+      (custom_type_imports + serializer_types).uniq - Array(self_type_name)
     end
 
     def inspect
@@ -75,6 +75,10 @@ def inspect
 
     private
 
+    def self_type_name
+      serializer.name.match(/(\w+::)?(\w+)(Serializer|Resource)/)[2]
+    end
+
     def extract_typescript_types(type)
       type.split(/[<>\[\],\s|]+/)
     end

spec/__snapshots__/AlbaPost.ts.snap

@@ -1,4 +1,4 @@
-// Typelizer digest a9453a41deef37fc65276aad80c95e46
+// Typelizer digest c272bbef7d366eb5882788757480509d
 //
 // DO NOT MODIFY: This file was automatically generated by Typelizer.
 import type {AlbaUser} from '@/types'
@@ -10,6 +10,7 @@ type AlbaPost = {
   body?: string | null;
   published_at?: string | null;
   user: AlbaUser;
+  next_post: Post;
 }
 
 export default AlbaPost;

spec/app/app/models/post.rb

@@ -2,4 +2,8 @@ class Post < ApplicationRecord
   belongs_to :user
 
   enum category: {news: 1, article: 2, blog: 3}
+
+  def next_post
+    # Returns Post
+  end
 end

spec/app/app/serializers/alba/post_serializer.rb

@@ -5,11 +5,16 @@ class PostSerializer
 
     typelizer_config do |c|
       c.null_strategy = :nullable_and_optional
-      c.serializer_model_mapper = ->(serializer) { Object.const_get(serializer.name.gsub("Serializer", "").gsub("Alba::", "")) }
+      c.serializer_model_mapper = lambda { |serializer|
+        Object.const_get(serializer.name.gsub("Serializer", "").gsub("Alba::", ""))
+      }
     end
 
     attributes :id, :title, :category, :body, :published_at
 
     has_one :user, serializer: UserSerializer
+
+    attributes :next_post
+    typelize next_post: "Post"
   end
 end