feat: allow to use false for "no tools" (#55)

* Allow false

* -

Author: OskarStark

README.md

@@ -50,7 +50,7 @@ llm_chain:
             platform: 'llm_chain.platform.anthropic'
             model:
                 name: 'Claude'
-            tools: # Unconfigured all tools are injected into the chain, use "[]" to have no tools.
+            tools: # Unconfigured all tools are injected into the chain, use "[]" or "false" to have no tools.
                 - 'PhpLlm\LlmChain\Chain\ToolBox\Tool\Wikipedia'
     store:
         # also azure_search, mongodb and pinecone are supported as store type

src/DependencyInjection/Configuration.php

@@ -64,6 +64,10 @@ public function getConfigTreeBuilder(): TreeBuilder
                                 ->end()
                             ->end()
                             ->arrayNode('tools')
+                                ->beforeNormalization()
+                                    ->ifTrue(fn ($v) => false === $v)
+                                    ->then(fn () => [])
+                                ->end()
                                 ->scalarPrototype()->end()
                             ->end()
                         ->end()