feat: add free openrouter models

[thePrnvBot]

Updated Deepseek R1 0528 Tool Call to false

Updated Meta Llama 3.3 70B Instruct Context and Output Limits

Added Model Families: liquid, allenai and sourceful

Added Free Models to Openrouter Provider:

AllenAI Models:

• Molmo2 8B (free)

Liquid Models:

• LFM2.5-1.2B-Instruct (free)
• LFM2.5-1.2B-Thinking (free)

Sourceful Models:

• Riverflow V2 Fast Preview
• Riverflow V2 Standard Preview
• Riverflow V2 Max Preview

Black Forest Labs Models:

• FLUX.2 Flex
• FLUX.2 Klein 4B
• FLUX.2 Max
• FLUX.2 Pro

Meta Llama Models:

• Llama 3.1 405B Instruct (free)
• Llama 3.2 3B Instruct (free)

Seed Models:

• Seedream 4.5

CognitiveComputation Models:

• Uncensored (free)

Tngtech Models:

• R1T Chimera (free)

Nouresearch Models:

• Hermes 3 405B Instruct (free)

OpenAI Models:

• gpt-oss-120b (free)
• gpt-oss-20b (free)

Nvidia Models:

• Nemotron 3 Nano 30B A3B (free)
• Nemotron Nano 12B 2 VL (free)
• Nemotron Nano 9B V2 (free)

Qwen Models:

• Qwen2.5-VL 7B Instruct (free)
• Qwen3 4B (free)
• Qwen3 Next 80B A3B Instruct (free)