Add context Settings to ollama

[Hunter6324]

Problem: ollama's default context is too short and creating a new model is too tedious

Suggestion: Add a custom context option similar to the custom temperature

[mrubens]

100%

[BradKML]

There are a few settings tweaks one with Ollama natively, imagine if the same can be applied to OpenRouter or some other flexible tooling

• https://ollama.com/mychen76/qwen3_cline_roocode
• https://ollama.com/tom_himanen/deepseek-r1-roo-cline-tools
• https://ollama.com/maryasov/qwen2.5-coder-cline