Feature: add logit bias as an argument

[StijnDeJong]

Using the logit bias, the chance of specific tokens being generated can be reduced/increased. Adding this argument allows more control over the AI. This requires:

• A string to token ids converter per AI (to make it more user friendly)
• Adding logit bias to Prompt
• Keyword for setting/changing one/multiple tokens
• Updating the tools to pass the logit bias