Description

This PR addresses two related configuration improvements:

1. Renames config variables for simplicity:

   • modelProvider → provider
   • modelName → model

2. Adds warnings instead of errors when users try to set non-existent config variables.

Implementation Details

Variable Renaming

• Added new variables while keeping old ones for backward compatibility
• Updated tests to work with both old and new variable names
• Added deprecation notices in the options documentation

Non-existent Config Variables

• Modified the config set command to warn rather than error when attempting to set an unknown config key
• Still displays the list of valid keys to guide users
• Allows the operation to proceed, which is useful for experimental features

Testing

• All tests have been updated and are passing
• Backward compatibility is maintained

Resolves #159
Resolves #160