Use Converse API for Bedrock provider

.gitignore

@@ -48,7 +48,7 @@ build-iPhoneSimulator/
 # for a library or gem, you might want to ignore these files since the code is
 # intended to run in multiple environments; otherwise, check them in:
 Gemfile.lock
-# .ruby-version
+.ruby-version
 # .ruby-gemset
 
 # unless supporting rvm < 1.11.0 or doing something fancy, ignore this:

lib/ruby_llm/providers/bedrock.rb

@@ -12,7 +12,6 @@ class Bedrock < Provider
       include Bedrock::Models
       include Bedrock::Signing
       include Bedrock::Media
-      include Anthropic::Tools
 
       def api_base
         "https://bedrock-runtime.#{@config.bedrock_region}.amazonaws.com"