Separate RBS files to _internal directory to avoid exposing RBS

sig/lib/_internal/rails.rbs

@@ -0,0 +1,10 @@
+class ::Hash[unchecked out K, unchecked out V]
+  def with_indifferent_access: () -> instance
+  def deep_merge!: (instance other) -> self
+end
+
+class ::Object
+  def presence: () -> String?
+  def blank?: () -> bool
+  def present?: () -> bool
+end

sig/lib/_rails.rbs

@@ -1,26 +1,17 @@
-class ::Hash[unchecked out K, unchecked out V]
-  def with_indifferent_access: () -> instance
-  def deep_merge!: (instance other) -> self
-end
-
-class ::Object
-  def presence: () -> String?
-  def blank?: () -> bool
-  def present?: () -> bool
-end
-
-interface _ActionControllerBase
-  def render: (*untyped args) { () -> untyped } -> untyped
-end
+module MetaTags
+  interface _ActionControllerBase
+    def render: (*untyped args) { () -> untyped } -> untyped
+  end
 
-interface _ActionViewBase
-  def tag: (String name, ?Hash[String | Symbol, untyped] options, ?bool open) -> void
+  interface _ActionViewBase
+    def tag: (String name, ?Hash[String | Symbol, untyped] options, ?bool open) -> void
 
-  def content_tag: (String name, String content, ?Hash[String | Symbol, untyped] options, ?bool open) -> void
+    def content_tag: (String name, String content, ?Hash[String | Symbol, untyped] options, ?bool open) -> void
 
-  def safe_join: (Array[String], String) -> String
+    def safe_join: (Array[String], String) -> String
 
-  def truncate: (String text, ?Hash[Symbol, untyped] options) -> String
+    def truncate: (String text, ?Hash[Symbol, untyped] options) -> String
 
-  def strip_tags: (String html) -> String
+    def strip_tags: (String html) -> String
+  end
 end