Add silly v0.2 config

[Tobivi]

Hi GaiaNet Team,

This PR adds a new node configuration for the silly-v0.2 model, using a Q4_K_M GGUF quantization. This is a popular fine-tuned model for creative and conversational tasks.

This contribution includes:

• The config.json file pointing to the model on the Hugging Face Hub.
• A README.md with setup instructions.

This configuration has been tested and runs successfully on my local GaiaNet node.

Thank you!