simplify: make initializer template more Rails-like

- Show only the essential API keys (OpenAI and Anthropic)
- Remove verbose comments and rarely-used options
- Follow Rails convention of minimal configuration

Author: crmne

lib/generators/ruby_llm/install/templates/initializer.rb.tt

@@ -1,14 +1,6 @@
-# RubyLLM configuration
 RubyLLM.configure do |config|
-  # Set your API keys here or use environment variables
-  # config.openai_api_key = ENV["OPENAI_API_KEY"]
-  # config.anthropic_api_key = ENV["ANTHROPIC_API_KEY"]
-  # config.gemini_api_key = ENV["GEMINI_API_KEY"]
-  # config.deepseek_api_key = ENV["DEEPSEEK_API_KEY"]
-  
-  # Uncomment to set a default model
-  # config.default_model = "gpt-4o-mini"
-  
-  # Uncomment to set default options
-  # config.default_options = { temperature: 0.7 }
+  config.openai_api_key = ENV["OPENAI_API_KEY"]
+  config.anthropic_api_key = ENV["ANTHROPIC_API_KEY"]
+
+  # config.default_model = "gpt-4.1-nano"
 end