[Docs] Point to smoothquant guide after failure to match

[kylesayrs]

Purpose

• Encourage open source community engagement by pointing to resources for users to add their own smoothquant mappings

Related issues

• W8A8 quant for GPT-J failed #909

Changes

• Catch errors that result from failure to match mappings to modules. Have that error point users towards the smoothquant guide
• Reduce error verbosity when match_layers_params fails
  • While there's some sense in printing the whole module, the module repr is almost always not unique and is not any more helpful than just printing the name of the module

Testing

• TODO: Test and show resulting UI

[github-actions]

👋 Hi! Thank you for contributing to llm-compressor. Please add the ready label when the PR is ready for review.

[kylesayrs]

This has already been implemented by the handle_mapping_resolution_errors wrapper

RuntimeError: Error resolving mappings for given architecture.Please refer to the README at /home/ksayers/llm-compressor/src/llmcompressor/modifiers/smoothquant/README.md for more information.