Fix RBS type signatures based on feedback

- Add optional block parameters to react_component, react_component_hash, and
  internal_react_component helper methods to support yielding in view code
- Change Controller#redux_store immediate_hydration parameter from bool? to bool
  to disallow explicit nil (nil is handled via parameter omission)
- Fix PrerenderError to use attr_reader instead of attr_accessor
- Mark PrerenderError attributes as optional types (String?, Hash?, Array?)
- Add missing attr_readers (component_name, props, console_messages)
- Add missing public methods (to_honeybadger_context, raven_context,
  to_error_context)

All changes improve type accuracy and match actual Ruby implementation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

sig/react_on_rails.rbs

@@ -13,21 +13,23 @@ module ReactOnRails
   end
 
   class PrerenderError < Error
-    attr_accessor js_code: String?
-    attr_accessor err: Hash[Symbol, untyped]
-    attr_accessor js_message: String
+    attr_reader component_name: String?
+    attr_reader js_code: String?
+    attr_reader err: Hash[Symbol, untyped]?
+    attr_reader props: (Hash[Symbol, untyped] | String)?
+    attr_reader console_messages: Array[String]?
 
     def initialize: (
       ?component_name: String?,
       ?js_code: String?,
-      ?err: Hash[Symbol, untyped],
+      ?err: Hash[Symbol, untyped]?,
       ?props: (Hash[Symbol, untyped] | String)?,
-      ?js_message: String
+      ?console_messages: Array[String]?
     ) -> void
 
-    def console_messages: () -> Array[String]
-    def base_message: () -> String
-    def build_message: () -> String
+    def to_honeybadger_context: () -> Hash[Symbol, untyped]
+    def raven_context: () -> Hash[Symbol, untyped]
+    def to_error_context: () -> Hash[Symbol, untyped]
   end
 
   class JsonParseError < Error

sig/react_on_rails/controller.rbs

@@ -3,7 +3,7 @@ module ReactOnRails
     def redux_store: (
       String store_name,
       ?props: untyped,
-      ?immediate_hydration: bool?
+      ?immediate_hydration: bool
     ) -> void
 
     def redux_store_hydration_data: () -> String

sig/react_on_rails/helper.rbs

@@ -6,12 +6,12 @@ module ReactOnRails
     def react_component: (
       String component_name,
       ?Hash[Symbol, untyped] options
-    ) -> String
+    ) ?{ () -> untyped } -> String
 
     def react_component_hash: (
       String component_name,
       ?Hash[Symbol, untyped] options
-    ) -> Hash[String, String]
+    ) ?{ () -> untyped } -> Hash[String, String]
 
     def redux_store: (
       String store_name,
@@ -36,7 +36,7 @@ module ReactOnRails
     def internal_react_component: (
       String component_name,
       Hash[Symbol, untyped] options
-    ) -> Hash[Symbol, untyped]
+    ) ?{ () -> untyped } -> Hash[Symbol, untyped]
 
     def build_react_component_result_for_server_rendered_string: (
       server_rendered_html: String,